DEMOGRAPHIC RESEARCH VOLUME 39, ARTICLE 44, PAGES 1181,1226 PUBLISHED 11 DECEMBER 2018 https://www.demographic-research.org/Volumes/Vol39/44/ DOI: 10.4054/DemRes.2018.39.44 Research Article Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses Samantha R. Lattof Ernestina Coast Tiziana Leone Philomena Nyarko © 2018 Lattof, Coast, Leone & Nyarko. This open-access work is published under the terms of the Creative Commons Attribution 3.0 Germany (CC BY 3.0 DE), which permits use, reproduction, and distribution in any medium, provided the original author(s) and source are given credit. See https://creativecommons.org/licenses/by/3.0/de/legalcode. Contents 1 Introduction 1182 2 Background 1183 2.1 Migration in Ghana 1183 2.2 Gender and migration 1185 2.3 Data sources for analysing migration in Ghana 1187 3 Data and methods 1188 3.1 Data 1188 3.2 Methods 1191 4 Results 1192 4.1 Identification of migrants 1192 4.2 Demographic structure of internal migrants 1196 4.3 Interregional female migration 1201 5 Discussion 1203 6 Acknowledgements 1206 References 1207 Appendices 1212 Demographic Research: Volume 39, Article 44 Research Article Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses Samantha R. Lattof1 Ernestina Coast2 Tiziana Leone3 Philomena Nyarko4 Abstract BACKGROUND Knowledge of female migration patterns is scant despite increased recognition and reporting of the feminization of migration. Recent data on female internal migration in Ghana challenges historical assumptions that underestimated female migration. OBJECTIVE This study presents the first detailed comparative analyses of female migration using microdata from Ghana’s censuses (2000 and 2010) and exploits this national data to understand the gendered dimensions of migration. METHODS Secondary analyses use direct and indirect methods to describe the scale, type, and demographic structure of contemporary female migration; assess the distribution of female migrants across age and geography; and estimate net internal female migration. RESULTS Excluding international migrants, census microdata identified 31.1% of females as internal migrants in 2000 and 37.4% of females as internal migrants in 2010. Working- age migration was particularly pronounced in 2010, reinforcing economic opportunity as a likely driver of migration for both sexes. Female migrants were significantly more likely than female nonmigrants to reside in urban areas and work for pay, profit, or family gain. By 2010, married women were less likely to migrate than peers who had 1 London School of Economics and Political Science, London, UK. Email: lattof@post.harvard.edu. 2 London School of Economics and Political Science, London, UK. 3 London School of Economics and Political Science, London, UK. 4 University of Ghana, Legon and Ghana Statistical Service, Accra, Ghana. http://www.demographic-research.org 1181 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses never married. Net out-migration exceeded net in-migration in eight of Ghana’s ten regions. CONTRIBUTION Our analyses expand the evidence base on contemporary female migration and refute the outdated stereotype that girls and women do not participate in migration. The prominence of the Greater Accra and Ashanti Regions as destinations for female migrants suggests that interventions are needed in Ghana’s more rural regions to reduce poverty and develop greater economic opportunities for girls and women. 1. Introduction Due to population growth and urbanization, projections suggest that two-thirds of the world’s population will reside in urban areas by 2050, with most of this increase occurring in Asia and Africa (UNDESA 2014). Planning for and managing this changing population distribution will require better understanding of new migration patterns and the impacts of internal migration. This includes a better understanding of female migration, which has been historically underestimated, with analyses focused on male migrants or assumptions that migrants were male (Caldwell 1969; Zlotnik 1995). Knowledge of female migration patterns is scant despite increased recognition and reporting of the feminization of internal migration (Hofmann and Buckley 2012; Beegle and Poulin 2013). Research from South Africa challenges the assumption that females represent the residentially stable population, finding women in rural areas to be highly mobile (Camlin, Snow, and Hosegood 2014). In Malawi, where young women now migrate more than young men, assumptions of traditional patterns of matrilocal residence following marriage no longer hold (Beegle and Poulin 2013). As evidence reveals changes in the sex composition of migrants, it also reveals changes in the reasons for migrating. While both sexes may attribute their migration decisions to factors such as the need to seek employment or a lack of independence at the place of origin, gender- specific factors emerge. In South Africa, girls experience an increased risk of moving out of the household following a parent’s AIDS-related death compared to boys; families experiencing a death may expect girls to perform caring duties elsewhere or may prefer to keep boys (Ford and Hosegood 2005). In Ghana, girls and women attribute their migrations to the need to accumulate property for marriage; to avoid harm, including female genital mutilation; and to avoid forced or arranged marriages 1182 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 that may be polygamous (Anarfi and Agyei 2009).5 These factors influence both the decision to migrate and the choice of destination. Data from Ghana’s two most recent Population and Housing Censuses (2000 and 2010) indicates that there are more female than male internal migrants, particularly at younger ages (GSS 2013c). The growing number of younger migrants puts increasing pressure on social services and employment opportunities in urban areas. Some migrants move to Ghana’s urban areas independent of available resources or employment opportunities (Agyei and Ofosu-Mensah Ababio 2009). This study analyses Ghana’s 2000 and 2010 Censuses using census microdata disaggregated by sex to provide a comprehensive picture of internal female migration at all ages. We use direct and indirect techniques to analyse the patterns, trends, and determinants of contemporary female migration. Our comparative analyses are the first to exploit national data from the 2000 and 2010 Censuses with a view to understanding the gendered dimensions of migration in Ghana. 2. Background 2.1 Migration in Ghana Migration has historically been a way of life in West Africa and migration within Ghana is no exception. Ghana’s internal migration is primarily a north–south phenomenon established well before the census started officially recording migration data in 1960 (Agyei and Ofosu-Mensah Ababio 2009). Since 1960, each census has recorded large out-migration streams from Ghana’s northern regions and significant in- migration streams into the Greater Accra Region, with Ghana’s 2010 Census recording an intercensal in-migration rate of 40.72% for Greater Accra (GSS 2013c). Nearly one- third (32.2%) of the Greater Accra Region’s population is between the ages of 15 and 29 years, due to a high rate of age-selective in-migration and rapid natural increase (GSS 2013b). Migrants residing in Accra also tend to be long-term migrants, with only about one in ten having moved in the 12 months prior to the 2010 Census (GSS 2013b). As a result, Ghana’s urban centres (Figure 1) are facing growing challenges brought on by unemployment, inadequate sanitation, and the development of shanty towns. Of the 1.6 million migrants residing in the Greater Accra Region during the 2010 Census, about 10% originated from Ghana’s three northern regions (GSS 2013b). With growing social acceptance of female independence and mobility, girls and women are now the majority of Ghana’s internal migrants. Among adolescents, females 5 Polygamy is illegal under Ghanaian civil law, but it is common in northern Ghana. http://www.demographic-research.org 1183 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses migrate from Ghana’s rural areas to the country’s urban areas at greater rates than males (GSS 2013a). The same pattern exists among youth aged 25 years and younger, with girls and young women comprising 60.5% of migrant youth (Anarfi and Appiah 2009). Girls frequently migrate before completing their education. Depending on the estimates, between 50% and 80% of female migrants have no formal education (Agyei and Ofosu- Mensah Ababio 2009; Frempong-Ainguah, Badasu, and Codjoe 2009; Quartey and Yambilla 2009). Figure 1: Map of Ghana by region with differentiated urbanization levels (2010) Note: Map created by the authors. There is debate about whether independent child migrants decide to migrate primarily as a result of poverty or for economic reasons (Anarfi and Agyei 2009). Commonly cited causes of child migration include deteriorating agricultural land, drought, poor market facilities, poor transport networks, lack of employment 1184 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 opportunities, and lack of desire to participate in the agricultural industry (Frempong- Ainguah, Badasu, and Codjoe 2009). Urban-pull factors and rural-push factors also influence children’s migration decisions. Push factors for child migration include parental inability to cater for their children’s needs, ethnic conflicts, lack of privacy and money, lack of interest in schooling from parents and/or children, maltreatment by family members, desire to prevent being given away in marriage, and lack of independence (Frempong-Ainguah, Badasu, and Codjoe 2009). Pull factors for child migration include assisting a sibling with work, schooling, learning a trade, working for money, experiencing city life, and staying with a relative (Frempong-Ainguah, Badasu, and Codjoe 2009). Child migrants experience a number of problems related to either their work or their young age: for instance, a decline in business, cheap prices for migrant services, harassment from city guards, financial problems, physically demanding work, work that is too difficult, no/insufficient work, no place to sleep, and high taxes (Kwankye and Addoquaye Tagoe 2009). Given these challenges, child migrants frequently return to their place of origin (Addoquaye Tagoe and Kwankye 2009). A survey conducted in northern Ghana among returned child migrants found that other reasons for children’s return included continuing their education, changed marital status, and being needed at home (Addoquaye Tagoe and Kwankye 2009). As children (and their families) appear to constantly weigh the costs and benefits of migrating to and from their place of origin, repeated migrations may occur (Anarfi and Kwankye 2009). 2.2 Gender and migration Defining the roles of girls and women as daughters, wives, and mothers has failed to recognize women’s work beyond reproductive labour (e.g., caregiving, household labour, unpaid work). This narrow view of female roles is present in the literature on migration. Migrant girls and women may be classified as ‘dependent’ or ‘independent’ based on whether they migrate as daughters and wives or as members of the workforce (Llácer et al. 2007: ii4). Similarly, the migration literature has referred to girls and women who migrate with fathers and husbands as “passive” rather than “active” migrants (Findley 1989). These labels are absent from the literature on migrant boys and men. Male migrants are not classified according to their relationship to their mothers and wives. In addition to using different language to describe the migration of girls and women, the migration literature has historically overlooked the roles of female migrants. Girls’ and women’s forms of migration and their migration-related employment have often been invisible and unrecognised, especially with regards to http://www.demographic-research.org 1185 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses migrant domestic work (Elias 2010). This invisibility stems from research in the 1960s and 1970s in which researchers often assumed migrants were male, focusing analyses on male migrants and historically underestimating female migration (Caldwell 1969; Zlotnik 1995). Sex-disaggregated census data increasingly shows growing mobility among girls and women, with migration rates frequently balanced between the sexes (Beegle and Poulin 2013; GSS 2013c; Camlin, Snow, and Hosegood 2014). While census data is limited to sex-disaggregated analyses, examining differences between the migration patterns of women and men is the first step in advancing our understanding of gender and migration. Migration increasingly allows girls and women to challenge traditional social roles in rural societies (Guo, Chow, and Palinkas 2011). In Ghana, girls challenge these roles by independently deciding to migrate (70% of girls vs. 54% of boys) and by personally financing their migrations (57.6% of girls vs. 34.9% of boys) (Anarfi and Agyei 2009). Research from the Democratic Republic of Congo and Senegal finds that, in patriarchal settings, women’s access to and support from migrant networks is crucial in order for women to migrate (Toma and Vause 2014). Upon migrating, migrant women develop and strengthen community ties by strategically giving gifts, sharing food, caring for children, and participating in reciprocal labour (Tufuor et al. 2015). Evidence suggests that gender-specific factors may influence girls’ and women’s choice of destination. Based on a survey of 450 child migrants residing in Accra and Kumasi in 2005, researchers found that migrant girls were occasionally pursued and recaptured by their families; this finding may illustrate one of the reasons why many females decide to move to Accra, the urban centre that is furthest from the northern regions (Anarfi and Agyei 2009). In addition to choice of destination, gender may influence where migrants work. In Accra, public spaces have historically been gendered: markets are associated with female entrepreneurship, whereas bus stations are associated with male entrepreneurship (Thiel and Stasik 2016). When mothers migrate, it can lead to restructuring of the parent–child relationship as well as paradoxes pertaining to mothers’ caregiving role (Resurreccion 2009; Contreras and Griffith 2012). With economic support now a key component of ‘superior motherhood,’ this type of support comes at a cost for migrant mothers: mothers may be absent from their children’s lives and unable to provide their children with emotional support and care from afar (Contreras and Griffith 2012: 62). Migration can enhance the value of motherhood, as mothers provide increased resources and improved material conditions for their children; however, migration can also diminish motherhood, as other family members are called upon to provide childcare responsibilities in the mother’s absence (Contreras and Griffith 2012). In this regard, mothers migrating independently without their children are in fact dependent upon family members’ ability to fulfil the daily caregiving role. 1186 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 2.3 Data sources for analysing migration in Ghana Ghana’s internal migration data comes primarily from the decennial censuses and ad hoc population surveys, as Ghana has no population register or administrative data suitable for migration analyses. While census data provides limited depth of information on female migration, it provides the most comprehensive source of evidence on female migration at all ages that can be exploited using demographic techniques. Ad hoc subnational surveys and research on female migration in Ghana are localized and small-scale, precluding national-level analyses (Awumbila and Ardayfio- Schandorf 2008; Anarfi and Kwankye 2009). These studies address important aspects of migration, such as push- and pull-factors underlying independent child migration, childcare practices among young migrants, and migrants’ livelihood strategies. National migration data comes from the Ghana Migration Study (1991–1992), “Development on the Move” migration study (2008–2009), Ghana Demographic and Health Surveys (conducted in 1988, 1993, 1998, 2003, 2008, and 2014), Ghana Living Standards Survey (conducted in 1987, 1988, 1991–1992, 1998–1999, 2005–2006, and 2013), and post-independence censuses (1960, 1970, 1984, 2000 and 2010). Each of these data sources has strengths and limitations for national-level analyses of migration. The 1991–1992 Ghana Migration Study (GMS), developed in response to inadequate migration data in prior censuses, provided a depth of migration data unparalleled by more recent surveys. It collected evidence on the processes, mechanisms, and effects of internal migration; however, this survey has not been repeated (Twum-Baah, Nabila, and Aryee 1995). Despite its relative depth of migration data, the 1991–1992 GMS has significant limitations: exclusion of child migrants younger than 15 years of age; documented implementation challenges, such as inaccessible enumeration areas (i.e., resulting from floods, ethnic conflicts, and broken transportation); and lack of technical assistance required to implement the survey (Twum-Baah, Nabila, and Aryee 1995). To fill evidence gaps in migration’s developmental impacts and policy that were unaddressed in the GMS, the Regional Institute for Population Studies at the University of Ghana and the Global Development Network collaborated in 2008–2009 on a nationally representative survey entitled “Development on the Move: Measuring and Optimising Migration’s Economic and Social Impacts” (Yeboah et al. 2010). This study focused on international migration and its socioeconomic impacts on households and individuals remaining in Ghana. Ghana’s Demographic and Health Surveys (GDHS) (1988, 1998, 2003, and 2008) have each asked the same single question about migration – “How long have you been living continuously in (NAME OF CURRENT PLACE OF RESIDENCE)?” – and defined migrants based on how long they have lived in the enumeration area (GSS and IRD 1989; GSS and Macro International 1999; GSS, NMIMR, and ICF Macro 2004 http://www.demographic-research.org 1187 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses 2009). This question has several drawbacks for measuring migration. It precludes identification of types of migrants (e.g., internal, international) and calculation of subnational interregional migration flows. The 1993 GDHS included a five-question migration module that went beyond birthplace to include whether or not the respondent had lived elsewhere for at least six months, age at first migration, and reason for first migration (GSS, GHS, and ICF Macro 1994). Most recently, the 2014 GDHS asked respondents how many times in the last 12 months they had been away from home for one or more nights and whether they had been away from home for more than one month at a time (GSS, GHS, and DHS Program 2015). These questions have not been repeated, preventing comparative analyses across GDHS. Furthermore, GDHS sampling in Ghana excludes girls and women outside 15–49 years of age. The Ghana Living Standards Survey (GLSS) assesses living conditions in Ghanaian households using a nationally representative sample. In the household roster, the 2012–2013 GLSS6 captures region/country of birth (question 11) and how many months during the past 12 months the person (aged six months and older) has been away from this household (question 22). The survey also contains a ten-question module on migration (Section 5A) that collects data such as timing of move/return, intentions to stay, occupation and industry of migrant labour, and reason for migrating. The GLSS6 is a valuable source of migration data since this migration data is linked to detailed individual- and household-level sociodemographic data; however, the ten- question module is asked only of household members aged seven years or older. 3. Data and methods 3.1 Data Through the Ghana Statistical Service (GSS), we obtained a 10% random sample for both the 2000 and 2010 Censuses along with all available questionnaires, manuals, codebooks, and reports. To assess data quality, we reviewed the post-enumeration surveys conducted to assess coverage and content errors (GSS 2003, 2012). Three months after the 2000 Census, the post-enumeration survey sampled 200 out of 26,716 enumeration areas to collect data on eight selected census questions, including place of usual residence (GSS 2003). The post-enumeration survey data was matched to the census data and reconciled where necessary. Unfortunately, planning for the 2000 post- enumeration survey was more effective than its data management; the 2000 post- enumeration survey data is physically missing, preventing analysis of whether or not the final census results required adjustment. 1188 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 Implementation was greatly improved for the 2010 Census post-enumeration survey, which sampled 250 out of 37,488 enumeration areas seven months after the census (GSS 2012). The post-enumeration survey found an omission rate of 3%, the erroneous inclusion of 1.3% of the population in the census, and a greater chance of males (3.3%) being omitted from the census than females (2.8%) (GSS 2012). Based on the low net coverage error of 1.8% at the national level, it was unnecessary to adjust the 2010 Census results for our analyses. However, some populations, such as migrant kayayei (female porters who carry loads on their heads at markets and transportation centres), proved challenging to enumerate in the 2010 Census since they are highly mobile and occasionally homeless; this population reportedly exceeded estimates and required additional time to enumerate in Accra (Daily Express 2010). Comparing key variables between the microdata and censuses reveals that the microdata sample from the 2010 Census more accurately reflects the complete census than the microdata sample from 2000, in which the age structure differs slightly (Table 1). Table 1: Comparison of microdata samples to the 2000 and 2010 Censuses 2000 2010 Census Sample (10.0%) Census Sample (10.0%) Total population 18,912,079 1,891,158 24,658,823 2,466,289 Sex Female 9,554,697 (50.5%) 955,504 (50.5%) 12,633,978 (51.2%) 1,262,598 (51.2%) Male 9,357,382 (49.5%) 935,654 (49.5%) 12,024,845 (48.8%) 1,203,691 (48.8%) Enumeration locality Rural 10,637,809 (56.2%) 1,063,732 (56.2%) 49.1% 49.1% Urban 8,274,270 (43.8%) 827,426 (43.8%) 50.9% 50.9% Age structure Median age 19.4 19.0 20.0 20.0 Dependent population† 8,965,233 (47.4%) 880,031 (46.6%) 10,617,930 (43.1%) 1,060,608 (43.0%) Regional population distribution Highest share Ashanti (19.1%) Ashanti (19.1%) Ashanti (19.4%) Ashanti (19.3%) Lowest share Upper West (3.0%) Upper West (3.0%) Upper West (2.8%) Upper West (2.9%) Note: † Respondents aged <15 and >64 years. The 2000 and 2010 Censuses both included four questions to measure migration. However, the phrasing of these questions differed (Table 2), affecting cross-census comparability. Given these changes to the phrasing of migration questions between the 2000 and 2010 Censuses, the 2010 Census National Analytical Report acknowledges that the census data underestimates people’s actual mobility and does “not provide enough and adequate information on patterns and differentials of migration in a country” (GSS 2013c: 205). Several response categories also changed between the 2000 http://www.demographic-research.org 1189 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses and 2010 Censuses. Changes to response categories between censuses (e.g., additions, removals, or changes in definitions), and their analytic implications, are explored in the results. Table 2: Criteria for classifying migrants and nonmigrants by Ghana census questions on migration 2000 Census 2010 Census Census question Migrantdetermination Nonmigrant Census question Migrant determination Nonmigrant P06a BORN IN Person who is Ghanaian by Person who is P05 BIRTHPLACE: Person enumerated in Person THIS birth and enumerated in a place Ghanaian by Was (NAME) born a place different from enumerated TOWN/VILLAGE: different from the place where birth and in this town/village? the place where s/he in the place Was (NAME) born in s/he was born enumerated in If Yes, go to P07. was born where s/he this town or village? A NO answer is a lifetime the place A NO answer is a was born If Yes go to P07. migrant. where s/he migrant. A YES [Note: Only asked of was born answer is a respondents who International migrant = person for whom this answer is missing A YES answer nonmigrant.were Ghanaian by is a birth.] (implying that they are a foreign citizen) nonmigrant. P06b BIRTHPLACE Person who is Ghanaian by – P06 BIRTHPLACE: Person enumerated in – OUTSIDE THIS birth and enumerated in a place In what region or a place different from TOWN/VILLAGE: In different from the place where country was the place where s/he what region or s/he was born (NAME) born? was born country was (NAME) Internal migrant = person who is Internal migrant = born? Ghanaian by birth and born in person born in Ghana [Note: Only asked of one of Ghana’s nine regions outside the place of respondents who outside the region of enumeration were Ghanaian by enumeration birth.] International migrant = International migrant = person person born outside who is Ghanaian by birth and Ghana born outside Ghana All respondents are All respondents answering are migrants. lifetime migrants. P07 USUAL PLACE Person enumerated in a place Person P07 LIVING IN Person who has not Person who OF RESIDENCE: In different from her/his usual enumerated in THIS lived in the place of has lived in what district is place of residence her/his usual TOWN/VILLAGE: enumeration for her/his the place of (NAME’S) usual Internal migrant = person who district of Has (NAME) been entire life enumeration residence? usually resides in one of residence living in this town A NO answer is a for her/his Ghana’s districts outside the or village since migrant. entire life district of enumeration birth? If Yes, go to A YES P09. International migrant = person answer is a who usually resides outside nonmigrant. Ghana P08 PLACE OF Person whose place of Person whose P08 NUMBER OF Person who has lived Person who RESIDENCE FIVE residence at the 2000 Census district of YEARS LIVED IN in the place of has lived in YEARS AGO IF differs from her/his place of residence at THIS enumeration for a the place of (NAME) IS FIVE residence in 1995 the 2000 TOWN/VILLAGE: period less than her/his enumeration YEARS OR OLDER: Internal migrant = person who Census is the For how long has age for her/his In what district was usually resided in 1995 in one of same as that (NAME) been living entire life (NAME’S) usual districts outside the district of in 1995 in this town or place of residence enumeration village? five years ago? International migrant = person who usually resided outside Ghana in 1995 1190 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 Definitions in this paper are consistent with those used by the GSS. “Lifetime migrants” are people whose residence at the census differs from their birthplace (GSS 2013c), with “birthplace” defined as “the town or village (locality) of usual residence of the [infant’s] mother at the time of birth” (GSS 1999: 37). “District of usual residence” refers to the district in which the respondent usually resides and may be the place where s/he was enumerated; however, in cases where respondents maintain multiple residences (e.g., students, military personnel), “usual residence” refers to “where the person spends most of his/her days or time” (GSS 1999: 38). A respondent may also be considered a “usual resident” if s/he has “lived there for at least six months or has the intention of staying for the next six months” (GSS 1999: 38). 3.2 Methods Secondary analyses of the 2000 and 2010 Census microdata were conducted using SPSS Statistics 22.0 and Microsoft Excel 2011 software. We used direct and indirect demographic techniques (UNDESA 1970; Moultrie et al. 2013) to describe the scale, type, and demographic structure (e.g., age, religion, marital status) of contemporary female migration in Ghana and to assess the distribution of female migrants across age and geography. We detail these methods and their assumptions in a technical appendix (Appendix 1). In order to represent typical age patterns of migration, we fitted a Rogers–Castro multiexponential model migration schedule to observed female migration data (Rogers and Castro 1981; Little and Dorrington 2013) (Appendix 1, Section A-1.1). These schedules, which range from 7 to 13 parameters depending on the model’s complexity, depict the dependency between age and migration for use in population projections and in understanding migration dynamics (Little and Dorrington 2013). While not all data will produce a shape compatible with the multiexponential model migration schedule, researchers have successfully fitted the schedule to migration flows in North America, Europe, Asia, and Africa (Little and Dorrington 2013). To examine the effects of demographic indicators on the likelihood of a girl or woman migrating internally in 2000 and 2010, we conducted logistic regression analyses (Appendix 1, Section A-1.2). Binary logistic regression modelled the effects of selected independent variables on whether or not a girl or woman was identified in the census as ever having migrated internally. Selection of the independent variables was based on a literature review of push- and pull-factors of migration. Finally, we generated estimates of net internal female migration between subnational regions from place of birth data (Dorrington 2013) (Appendix 1, Section A-1.3). While we considered estimates produced using the http://www.demographic-research.org 1191 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses cohort component method (Spoorenberg 2015), our estimates of net internal migration from place of birth data appear more robust (Appendix 1, Section A-1.4). 4. Results After first identifying all migrants in the census data, we present analyses of the demographic structure of internal migrants. We then explore the demographic characteristics of female migrants, using regression analyses to explain internal migration status, with “internal migrant” as the dependent variable (yes/no). After examining who migrates, we analyse their migration destinations. The results conclude with analyses of interregional migration, including patterns and trends in the geographic distribution of internal migrants and estimates of interregional female migration between 2000 and 2010. 4.1 Identification of migrants Migrants in the 2000 and 2010 Censuses were identified and classified according to the criteria in Table 2. The 2000 Census microdata identified a total of 359,960 female internal and international migrants (37.7% of the female population) and 371,577 male internal and international migrants (39.7% of the male population) (Appendix 2, Table A-7). In the 2010 microdata, the questions identified 487,376 female internal and international migrants (38.6% of the female population) and 447,485 male internal and international migrants (37.2% of the male population). Of the female migrants identified in the 2010 microdata, international migrants comprised 3.1% of the sample (15,123). The 2000 Census permitted more refined identification of international migrants, since it collected data on place of usual residence at the time of the census and place of usual residence five years prior to the census. In the 2000 microdata, female migrants can be split into 62,929 international migrants (13.5%) and 402,146 internal migrants (86.5%). Between 2000 and 2010, the proportion of lifetime internal migrants increased for both females and males (28.7% to 35.6% and 28.1% to 34.2% respectively). The relative increase in lifetime migration was greater for females during this period. At the subnational level, we identified interregional lifetime migration for both sexes using region of birth and region of residence at enumeration (Tables 3 and 4). This identification ignores any interim migration and captures only migration between region of birth and region of residence at enumeration. 1192 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 Table 3: Female population classified by region of birth and region of enumeration, Ghana, 2000 and 2010 Region Region of enumeration of birth Western Central Greater Volta Eastern Ashanti Brong Northern Upper Upper Total Accra Ahafo East West a) Region of birth by region of enumeration at 2000 Census Western 642,460 16,760 28,380 2,920 8,000 21,060 5,560 1,880 1,600 1,410 730,030 Central 62,770 676,570 89,760 3,260 29,500 42,480 7,160 2,840 1,000 740 916,080 Greater Accra 11,700 15,640 809,900 13,850 27,230 17,310 6,220 3,420 2,230 1,420 908,920 Volta 22,260 13,250 125,930 725,740 54,130 23,840 13,520 8,610 780 810 988,870 Eastern 29,300 21,540 162,960 11,400 858,730 37,760 8,970 2,120 1,420 930 1,135,130 Ashanti 44,500 15,970 78,680 5,070 19,850 1,304,400 36,120 7,360 8,830 5,340 1,526,120 Brong Ahafo 28,420 3,300 16,980 2,130 5,150 35,620 683,910 5,640 2,310 3,390 786,850 Northern 8,870 3,020 23,010 14,910 5,600 31,620 27,290 821,860 4,020 2,660 942,860 Upper East 19,410 2,550 12,680 960 4,480 42,890 23,720 10,410 422,900 1,440 541,440 Upper West 12,370 1,890 9,710 810 3,860 22,890 40,210 12,700 2,200 264,120 370,760 Total 882,060 770,490 1,357,990 781,050 1,016,530 1,579,870 852,680 876,840 447,290 282,260 8,847,060 b) Region of birth by region of enumeration at 2010 Census Western 909,160 30,970 43,610 3,640 11,730 40,980 10,090 1,210 1,600 1,540 1,054,530 Central 71,810 945,810 136,770 4,840 35,330 58,510 8,150 1,880 590 650 1,264,340 Greater Accra 15,150 43,100 1,188,210 19,930 37,770 25,650 7,480 3,620 2,510 1,480 1,344,900 Volta 23,340 22,980 180,300 1,000,130 63,580 26,720 15,900 8,660 880 710 1,343,200 Eastern 28,610 38,450 245,430 15,380 1,123,500 46,750 10,290 1,830 1,030 1,000 1,512,270 Ashanti 41,350 29,580 125,150 7,230 28,910 2,011,670 44,260 7,620 12,740 5,230 2,313,740 Brong Ahafo 27,870 7,730 32,930 3,850 8,780 77,220 943,410 6,700 2,550 5,170 1,116,210 Northern 18,190 6,950 49,480 17,280 10,890 61,570 40,740 1,190,720 5,970 3,620 1,405,410 Upper East 21,250 3,850 20,530 910 6,610 66,430 29,680 9,560 500,400 2,230 661,450 Upper West 13,370 2,050 9,910 610 4,170 28,600 50,520 11,820 2,770 334,880 458,700 Total 1,170,100 1,131,470 2,032,320 1,073,800 1,331,270 2,444,100 1,160,520 1,243,620 531,040 356,510 12,474,750 http://www.demographic-research.org 1193 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses Table 4: Male population classified by region of birth and region of enumeration, Ghana, 2000 and 2010 Region Region of enumeration of birth Western Central Greater Volta Eastern Ashanti Brong Northern Upper Upper Total Accra Ahafo East West a) Region of birth by region of enumeration at 2000 Census Western 613,470 14,430 26,760 2,620 7,390 19,710 5,580 1,750 1,870 1,440 695,020 Central 62,760 593,640 85,470 3,460 25,960 43,890 8,380 3,470 910 520 828,460 Greater Accra 13,890 15,600 769,250 14,930 27,750 19,980 7,480 3,620 2,480 1,200 876,180 Volta 25,450 13,360 122,100 665,010 52,970 26,210 14,590 9,030 1,090 780 930,590 Eastern 33,250 21,020 151,680 10,780 804,890 39,620 9,700 2,330 1,540 790 1,075,600 Ashanti 48,040 15,600 80,840 4,170 18,940 1,222,970 34,200 7,190 8,850 4,610 1,445,410 Brong Ahafo 30,760 3,690 17,350 2,210 5,170 35,070 647,860 5,340 2,530 2,600 752,580 Northern 10,710 3,630 23,200 14,170 7,260 35,630 32,400 796,510 3,680 2,510 929,700 Upper East 23,880 2,890 14,600 1,070 6,230 49,060 29,090 8,390 372,130 1,040 508,380 Upper West 13,780 1,940 8,700 1,060 5,310 27,470 49,760 12,530 2,090 242,230 364,870 Total 875,990 685,800 1,299,950 719,480 961,870 1,519,610 839,040 850,160 397,170 257,720 8,406,790 b) Region of birth by region of enumeration at 2010 Census Western 874,870 25,780 38,060 2,790 10,360 37,300 11,550 1,070 1,730 1,640 1,005,150 Central 72,240 850,070 117,280 4,790 31,750 54,310 9,030 1,880 800 810 1,142,960 Greater Accra 20,080 41,520 1,137,810 20,680 36,550 27,510 9,220 3,800 3,370 1,700 1,302,240 Volta 27,770 25,350 164,370 922,570 63,920 31,140 18,380 8,050 1,240 700 1,263,490 Eastern 34,700 37,390 211,150 14,320 1,071,690 46,210 11,210 2,130 1,600 910 1,431,310 Ashanti 50,080 31,680 123,980 6,700 27,270 1,868,170 47,390 7,400 12,710 5,840 2,181,220 Brong Ahafo 32,480 9,420 29,570 3,330 9,300 66,940 895,440 6,250 2,480 4,430 1,059,640 Northern 21,890 7,840 45,020 16,990 13,680 61,050 47,070 1,172,660 5,250 4,200 1,395,650 Upper East 26,540 5,250 20,180 910 7,460 65,630 33,050 7,150 471,290 1,610 639,070 Upper West 14,880 2,650 7,240 680 6,190 27,940 55,620 10,430 1,820 315,410 442,860 Total 1,175,530 1,036,950 1,894,660 993,760 1,278,170 2,286,200 1,137,960 1,220,820 502,290 337,250 11,863,590 Figures 2 and 3 condense these migration streams by sex into noncumulative, stacked column charts that compare the totals (i.e., net lifetime migration) and their shares (i.e., lifetime out-migrants, lifetime in-migrants) (Appendix 2, Tables A-8 and A-9). Four regions experienced population gains in net lifetime migration streams by 1194 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 both sexes in 2000 and 2010: Greater Accra, Western, Ashanti, and Brong Ahafo. The remaining six regions experienced net losses by both sexes in 2000 and 2010. Figure 2: Lifetime female migration streams, Ghana, 2000 (blue) and 2010 (red) 3,000,000 2,500,000 2,000,000 1,500,000 Net lifetime migration, 2010 Lifetime out-migrants, 2010 1,000,000 Lifetime in-migrants, 2010 500,000 Net lifetime migration, 2000 0 Lifetime out-migrants, 2000 Lifetime in-migrants, 2000 -500,000 Region of origin and destination Figure 3: Lifetime male migration streams, Ghana, 2000 (blue) and 2010 (red) 3,000,000 2,500,000 2,000,000 1,500,000 Net lifetime migration, 2010 Lifetime out-migrants, 2010 1,000,000 Lifetime in-migrants, 2010 500,000 Net lifetime migration, 2000 0 Lifetime out-migrants, 2000 Lifetime in-migrants, 2000 -500,000 Region of origin and destination http://www.demographic-research.org 1195 Number of migrants Number of migrants Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses 4.2 Demographic structure of internal migrants Disaggregating internal migrants by age and sex highlights changes between groups and over time. Though Ghanaians migrate at all ages, the mean age of internal migrants increased over time. From 2000 to 2010, the mean age of female internal migrants rose from 27.39 years (s.d. 18.86) to 29.71 years (s.d. 18.69). Males showed a similar trend, with the mean age of internal migrants increasing from 28.48 years (s.d. 19.57) to 29.71 years (s.d. 18.62) between 2000 and 2010. Examining the distribution of migrants and nonmigrants by five-year age groups indicates growing relative migration between 2000 and 2010. In 2000, female nonmigrants outweighed female migrants in each five-year age group (Figure 4, top). By 2010, the percentage of female migrants overtook female nonmigrants among women aged between 25 and 49 years (Figure 4, bottom). For males in 2000, nonmigrants comprised a greater percentage of each age group than migrants, with the exception of the age group 45–49 years (Figure 5, top). By 2010, male migrants outweighed male nonmigrants among men aged between 30 and 59 years (Figure 5, bottom). Working-age migration was particularly pronounced in 2010 for both men and women. The age-related distribution of female and male regional out-migrants was assessed in greater detail using multiexponential model migration schedules (Figure 6) for age cohorts x‒5 to x over the period 1995–2000. Since retirement was not concentrated among specific ages in this data and the data may exaggerate older ages (Little and Dorrington 2013), the standard 7-parameter model fitted the observed data better than the more complex 9-, 11-, or 13-parameter models, which account for more complex components such as retirement peaks and post-retirement up-slopes. The mean absolute percentage error statistic, 7% for both sexes, is within the boundaries for achieving a reasonable fit. The R-squared values for males (92%) and females (89%) are acceptable compared to the established threshold of 90%, indicating that the models reasonably fit the data (Little and Dorrington 2013). T-statistics are significant at the 0.05 level for all coefficients. For both sexes, the rate of ascent of the labour force component is greater than the rate of this component’s descent. Female migration propensity rises sharply from the age of 10, peaking at 0.09097 at the age of 23 years. Male migration propensity peaks several years later at 0.10204 at the age of 27 years. 1196 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 Figure 4: Female population pyramid by migrant status, 2000 Census (top) and 2010 Census (bottom) 95—99 % Internal migrants 90—94 % Nonmigrants 85—89 80—84 75—79 70—74 65—69 60—64 55—59 50—54 45—49 40—44 35—39 30—34 25—29 20—24 15—19 10—14 5—9 0—4 0—4 5—9 10—14 15—19 20—24 25—29 30—34 35—39 40—44 45—49 50—54 55—59 60—64 65—69 70—74 75—79 80—84 85—89 90—94 95—99 14 12 10 8 6 4 2 0 2 4 6 8 10 12 14 Per cent http://www.demographic-research.org 1197 Age group (in years) Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses Figure 5: Male population pyramid by migrant status, 2000 Census (top) and 2010 Census (bottom) 95—99 % Internal migrants 90—94 % Nonmigrants 85—89 80—84 75—79 70—74 65—69 60—64 55—59 50—54 45—49 40—44 35—39 30—34 25—29 20—24 15—19 10—14 5—9 0—4 0—4 5—9 10—14 15—19 20—24 25—29 30—34 35—39 40—44 45—49 50—54 55—59 60—64 65—69 70—74 75—79 80—84 85—89 90—94 95—99 14 12 10 8 6 4 2 0 2 4 6 8 10 12 14 Per cent 1198 http://www.demographic-research.org Age group (in years) Demographic Research: Volume 39, Article 44 Figure 6: Regional out-migration by sex over the five-year interval, 1995–2000, and fitted with a 7-parameter model schedule, Ghana, 2000 Census 10% microdata 0.12 Female obs Female fit 0.1 Male obs Male fit 0.08 0.06 0.04 0.02 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 Age (in years) After identifying all female internal migrants in the microdata and examining migrant status by sex and age, we analysed the effects of demographic indicators on the likelihood of a girl or woman being identified as an internal migrant (Table 5). International migrants are excluded from these regression analyses. Age, in five-year age groups, and education status were nonsignificant predictors. These variables are excluded from the final models for 2000 and 2010, as they worsened or did not significantly improve the models’ ability to predict internal migrant status. The model for 2000 accurately predicts 63.5% of cases, predicting nonmigrants (85.1%) better than internal migrants (29.7%). The 2010 model improves the accuracy of predicting internal migrants (51.1%). It accurately predicts 65.7% of cases, including 75.5% of nonmigrants. Difficulties in accurately determining migrant status based on census data are likely to affect the models’ predictive abilities. Although both models have low R- squared values, they also have statistically significant predictors that can be used to draw conclusions about migrant status. http://www.demographic-research.org 1199 Migration probability Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses Table 5: Regression results explaining female internal migration status in Ghana, 2000 and 2010 Census microdata, with internal migrant as the dependent variable 2000 2010 Demographic characteristics (Independent variables) Odds ratio Std. Error 95% C.I. Odds ratio Std. Error 95% C.I. Rural Ref – – Ref – – Residence Urban 1.377 0.006 1.362–1.393 1.602 0.004 1.589–1.616 Never married Ref – – Ref – – Marital status Married 0.999 0.009 0.982–1.017 0.981 0.007 0.967–0.994 Consensual union† 0.937 0.013 0.914–0.960 1.000 0.011 0.979–1.022 Separated 0.902 0.021 0.866–0.940 0.834 0.016 0.809–0.860 Divorced 0.758 0.014 0.737–0.780 0.827 0.012 0.808–0.847 Widowed 0.775 0.014 0.755–0.796 0.804 0.010 0.788–0.821 Worked for pay, Did not work Ref – – Ref – – profit, or family gain Worked 1.117 0.006 1.104–1.130 1.097 0.005 1.086–1.107 Head Ref – – Ref – – Relationship to head of household Nonrelative 1.952 0.018 1.886–2.021 2.091 0.009 2.024–2.161 Temporary head‡ 1.355 0.018 1.309–1.403 – – – Group quarters§ 4.468 0.074 3.861–5.169 1.320 0.015 1.283–1.358 Spouse 1.401 0.010 1.375–1.428 1.271 0.007 1.252–1.289 Child 0.519 0.011 0.508–0.529 0.356 0.008 0.350–0.361 Parent or parent-in-law 1.190 0.021 1.142–1.241 1.017 0.016 0.986–1.049 Daughter-in-law 1.055 0.022 1.010–1.102 0.758 0.020 0.729–0.789 Grandchild 0.397 0.019 0.382–0.412 0.294 0.012 0.287–0.300 Sister‡ – – – 0.787 0.011 0.769–0.804 Stepchild‡ – – – 0.547 0.025 0.521–0.574 Adopted/ foster child‡ – – – 0.724 0.031 0.681–0.769 Other relative 1.156 0.010 1.134–1.178 0.914 0.009 0.898–0.930 No religion Ref – – Ref – – Religion Catholic 0.918 0.014 0.893–0.944 1.178 0.012 1.150–1.206 Protestant 1.019 0.014 0.991–1.046 1.277 0.012 1.248–1.307 Pentecostal¶ 1.154 0.014 1.124–1.185 1.561 0.011 1.527–1.597 Other Christian 1.033 0.015 1.003–1.063 1.294 0.012 1.263–1.326 Muslim 0.616 0.015 0.598–0.634 0.758 0.012 0.740–0.776 Ahmadi‡ – – – 1.118 0.029 1.057–1.182 Traditional 0.397 0.017 0.384–0.410 0.516 0.015 0.501–0.532 Other 1.158 0.034 1.082–1.239 1.285 0.025 1.223–1.350 Cox & Snell R2 0.067 0.105 Nagelkerke R2 0.090 0.142 Notes: † In 2010 this category included informal unions and living together. ‡ This response category is included in only one census. § Group quarters included members of nonhousehold populations (e.g., nurses working the night shift) and referred to places such as hotels, orphanages, universities, prisons, and hospitals. ¶ In 2010 the category Pentecostal included respondents who identified as Charismatic. Being a female migrant is significantly associated with residing in an urban area, indicating the prominence of rural–urban migration. Residing at a residence where relationship to the household head is group quarters, nonrelative, temporary head, 1200 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 spouse, or parent/parent-in-law also increases a census respondent’s odds of being identified as an internal migrant. Female migrants are more likely than nonmigrants to report working for pay, profit, or family gain, suggesting that economic opportunity is a likely driver of migration. By 2010, female migrants are likelier to have never married than be married. Female census respondents are substantially less likely to be identified as internal migrants in 2000 and 2010 if they practise a traditional religion or Islam and if they are the children of the household head. 4.3 Interregional female migration Key features of Ghanaian female internal migration include the high concentration of intraregional migration within all regions and out-migration from the Upper East, Upper West, Northern, Volta, and Central Regions, with no significant in-migration. The Greater Accra Region exhibited significant in-migration from all but three regions (Upper West, Upper East, and Brong Ahafo). The importance of the Greater Accra and Ashanti Regions as internal migration destinations is further underscored by examination of interregional female migration streams between 1995 and 2000. Using five-year fixed-interval data from the 2000 Census, we calculated interregional female migration streams between 1995 and 2000 in Ghana in the population aged five years and older. Table 6 depicts destination- specific out-migration rates for each of Ghana’s regions, producing a five-year migration rate for females who survived the period 1995–2000. Three of the five highest migration rates are among females migrating to Greater Accra from the Volta (0.0180), Eastern (0.0172), and Central Regions (0.0138). The highest rate is among females in the Western Region migrating to the Central Region (0.0218). The highest rates of migrants to the Ashanti Region are among females migrating from the Upper East (0.0129) and Brong Ahafo (0.0119) Regions. Regional estimates of the net number of interregional female in-migrants from 2000 to 2010 (Appendix 2, Table A-10) show that Greater Accra received the largest number of female migrants among all age groups. Of Ghana’s estimated 804,365 total female in-migrants (Table 7), nearly half (43.56%) migrated into Greater Accra, with the Ashanti Region, home to Ghana’s second largest city, receiving 22.47% of female in-migrants. The lowest levels of in-migrants are in northern Ghana, with a net number of 662 girls and women migrating into the Northern Region (0.08%) and 6,823 migrating into the Upper East Region (0.85%). Negative numbers in Table A-10 indicate negative net in-migration. The Upper West is the only region to experience overall net negative in-migration. Net in-migration in the Upper West Region for 2000 and 2010 is positive only among girls aged 0–4 years. http://www.demographic-research.org 1201 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses Table 6: Female interregional migration rates in 2000 as proportions of survivors of the 1995 population, female population aged five years and older Region of Region of residence at census, 2000 residence, 1995 Western Central Greater Accra Volta Eastern Ashanti Brong Ahafo Northern Upper Upper East West Total Western – 0.0218 0.0067 0.0025 0.0041 0.0099 0.0037 0.0007 0.0019 0.0023 0.0537 Central 0.0098 – 0.0138 0.0016 0.0052 0.0065 0.0012 0.0005 0.0005 0.0002 0.0394 Greater 0.0038 0.0080 – 0.0170 0.0086 0.0043 0.0014 0.0009 0.0011 0.0040 0.0490 Accra Volta 0.0032 0.0028 0.0180 – 0.0081 0.0029 0.0015 0.0014 0.0006 0.0005 0.0390 Eastern 0.0032 0.0043 0.0172 0.0046 – 0.0066 0.0016 0.0005 0.0006 0.0008 0.0394 Ashanti 0.0058 0.0033 0.0072 0.0016 0.0036 – 0.0085 0.0012 0.0017 0.0062 0.0391 Brong Ahafo 0.0053 0.0015 0.0042 0.0016 0.0022 0.0119 – 0.0037 0.0023 0.0037 0.0365 Northern 0.0018 0.0007 0.0046 0.0028 0.0017 0.0058 0.0044 – 0.0018 0.0015 0.0251 Upper East 0.0079 0.0020 0.0043 0.0011 0.0021 0.0129 0.0055 0.0041 – 0.0008 0.0408 Upper West 0.0077 0.0008 0.0043 0.0008 0.0016 0.0092 0.0128 0.0058 0.0010 – 0.0441 Note: Interregional migration rates over 0.0100 are emphasized in bold. Table 7: Estimates of overall net female out-migrants, in-migrants, and migration streams, Ghana, 2000 to 2010 Net in-migrants Net out-migrants Overall netRegion of origin and migration destination Total % Total % Western 42,208 5.25 55,919 6.83 –13,711 Central 91,774 11.41 107,894 13.19 –16,121 Greater Accra 350,391 43.56 50,179 6.13 300,213 Volta 8,186 1.02 109,747 13.41 –101,561 Eastern 70,757 8.80 141,887 17.34 –71,130 Ashanti 180,774 22.47 79,344 9.70 101,431 Brong Ahafo 64,635 8.04 79,573 9.73 –14,939 Northern 662 0.08 109,747 13.41 –109,085 Upper East 6,823 0.85 54,035 6.60 –47,212 Upper West –11,844 –1.47 29,890 3.65 –41,734 Total 804,365 100 818,215 100 –13,849 Regional estimates of the net number of female out-migrants (Appendix 2, Table A-11) show that the net out-migration was highest in the Eastern Region. Of Ghana’s 818,215 total female out-migrants (Table 7), 17.34% migrated from the Eastern Region, followed by the Northern and Volta Regions (13.41% each). Net out-migration was 1202 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 smallest in the Upper West Region with 29,890 female out-migrants (3.65%), followed by Greater Accra with 50,179 female out-migrants (6.13%). Negative numbers in Table A-11, such as among girls aged 5–14 years in the Upper West Region, indicate negative net out-migration. Among young girls in the Volta, Upper East, and Upper West Regions, the negative out-migration suggests that these children are likely to be returning home with a mother or father who was working outside the region. Among women aged 55 years and older in the Greater Accra, Western, Northern, Upper East, and Upper West Regions, negative out-migration suggests return migration of retiring workers. Combining estimates of net in-migration and net out-migration reveals that net out-migration exceeds net in-migration in eight of Ghana’s ten regions. Only the Greater Accra and Ashanti Regions have positive net overall migration (Table 7). By contrast, overall net migration is lowest in the Northern and Volta Regions, with more girls and women moving out of the regions than moving into them. 5. Discussion Our analyses reveal that the overwhelming focus of previous research on male internal migrants is misplaced. Internal migration in Ghana involves both sexes and warrants greater attention to sex-disaggregated analyses. Our analyses reveal that recent migration in Ghana is sex-balanced, according to the 47%–53% typology put forward by Donato and Gabaccia (2015). Ghanaian girls and women migrate at all ages, and approximately 40%–50% of these migrants are within age groups excluded from noncensus sources of national migration data (e.g., GDHS). Working-age migration is a key feature of migration for both sexes, peaking at earlier ages for females than males. Being a female migrant is significantly associated with residing in an urban area and working for pay, profit, or family gain. These findings suggest that economic opportunity is an important driver of female migration. Advancing our understanding of gender and migration requires paying greater attention to examining differences between the migration patterns of women and men. The historical narrative of the “passive” female migrant has no place in today’s evidence. The regression results indicate increased mobility and independence among female migrants, as reflected in their living situations. Female migrants exhibit greater odds of residing in group quarters, in a household where they are the temporary head of household, or in a household with a nonrelative head of the household. Moving with a spouse is no longer a precursor to female migration. By 2010, married women were less likely to migrate than peers who had never married. http://www.demographic-research.org 1203 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses Only the Greater Accra and Ashanti Regions, home to Ghana’s two largest cities, have positive net overall migration. With net out-migration exceeding net in-migration in eight of Ghana’s ten regions, productive female labour losses may have a negative impact on local development efforts and local economies. The prominence of the Greater Accra and Ashanti Regions as destinations for female migrants suggests that interventions are needed in Ghana’s more rural regions to reduce poverty and develop greater economic opportunities for girls and women. Ghana’s kayayei have become a visible sign of changing internal migration patterns. This growing population represents the face of female north–south, rural– urban migration in Ghana, with most migrant female youth becoming porters on arrival in Accra (Kwankye and Addoquaye Tagoe 2009). Though kayayei exist in Ghana’s second and third largest cities, Kumasi and Tamale, their presence in the capital has generated particular policy concerns (Parliament 2016). There is no accurate and reliable data on the number of kayayei; estimates range from 2,300 to 160,000 in Accra (Kearney 2013; Parliament 2016). Such variation in the estimates reveals a need for improved data on and reporting of female internal migration if policymakers are to address development-related issues in the sending and receiving communities. Our analyses highlight the valuable information that census data provides on migration’s demographic structure, patterns, and trends. Recent collaborations between the GSS and the International Organization for Migration suggest that future data collection activities in Ghana will pay greater attention to migration; however, existing census data presents an incomplete picture of contemporary female migration. Resource constraints in census offices, the expense of implementing a census, the balance of interests among census committee members, and political priorities frequently limit the number of migration questions in census questionnaires. Censuses also fail to capture migrants’ underlying motivations and migration experiences. Census analyses reveal a need for researchers to bring a gendered lens to issues such as drivers of migration, impacts of migration, and links between migration and health. Census data reveals nothing about migrants’ and nonmigrants’ opportunities or their perceptions of the costs and gains of migration. Breastfeeding infants may migrate with their mothers out of necessity, and girls from large families may be fostered out to aunts or other relatives. Preadolescent girls may independently decide to migrate in search of ways to pay their school fees. Censuses also miss the social and economic contributions that migrants make to their families and communities. Too often the lack of data on female migrants’ contributions reinforces the outdated stereotype that girls and women take passive roles in migration. Ad hoc subnational surveys and more detailed interviews can address these aspects of migration in greater depth, complementing national-level census analyses and presenting a completer picture of contemporary migration. 1204 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 The 2000 and 2010 Censuses have several limitations. Since the post-enumeration survey data collected after the 2000 Census is unavailable, it is impossible to assess the quality of the 2000 Census and whether the results required adjustment. Furthermore, the microdata from the 2000 Census is less representative of the national population than the microdata from the 2010 Census. While the post-enumeration survey conducted after the 2010 Census revealed no need to adjust the final results, the 2010 Census reportedly struggled to enumerate highly mobile populations like the kayayei (Daily Express 2010). It is possible that such migrant groups may be underrepresented, particularly if enumerators attempted to enumerate them during working hours or were unprepared to capture mobile populations’ large numbers. Additional data limitations include possible reference period error for the question asking about place of residence five years prior, potential uncertainty about exact geographic boundaries, and problems reporting age. One particular conceptual challenge is that the census questionnaires’ understanding and measuring of migration do not capture contemporary migration patterns identified via other sources of migration data. Most movements between place of birth and current residence are missing. The censuses fail to capture cyclical and short-term migrations, which are commonplace in Ghana, as well as seasonal or repeat migrations and migration histories. The censuses also struggle to capture migration duration and meaningful data on intraregional migration, which is more common than interregional migration. These challenges have implications for the types of migrants and migrations that are identified and included in national analyses. Identifying these types of migration patterns in the census would significantly strengthen the predictive ability of regression models examining determinants of migration, as well as sex- specific differences between migrants. The analyses conducted in this study provide a rich source of information on female migration across the lifespan that complements subnational migration studies and may have relevance in other low- and middle-income countries. Addressing the measurement and impact of female migration is an issue of importance for researchers, policymakers, and nongovernmental organizations working in the development sector. In order to better meet the varied needs of female migrants of all ages and to plan for changing population distribution within Ghana, we would make the following recommendations: ∂ Data collection and analyses of female migration cannot afford to exclude migrants outside 15–49 years of age. Female migrants have unique age- specific needs, such as integrating into a new school or ensuring that appropriate support systems exist to assist with challenges brought on by http://www.demographic-research.org 1205 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses ageing. Data is needed on female migrants of all ages, not just those of reproductive or working age. ∂ While multiple surveys measure migration at the national level, the questions they use infrequently permit comparative analyses across time or across surveys. Standardizing questions on migration would allow for more comprehensive analyses of national trends. ∂ Survey questions on migration should expand upon basic demographic data to include migrants’ underlying motivations, migration experiences, and economic contributions. ∂ Net out-migration in the Volta Region and northern Ghana (Upper West, Upper East, and Northern Regions) may negatively affect local economies and local development efforts. Policymakers concerned about the impact of this productive female labour loss should consider focused interventions in these rural regions to reduce poverty and develop greater economic opportunities for girls and women. Ultimately, female migration is a dynamic process with inextricable links to development, affecting factors such as the development of communities, the delivery of social services, and the impact of remittances. Should current trends continue, female migration within Africa will rise, particularly to regions offering economic opportunities. The planning of development programmes requires far better data sources than those currently existing, as well as greater attention to analyses using a gendered lens. 6. Acknowledgements We wish to thank Professor Rob Dorrington (University of Cape Town) for providing technical assistance on fitting the multiexponential model migration curve and Professor Allan G. Hill (University of Southampton) for his comments on an earlier version of this paper. We also thank the London School of Economics and Political Science for funding this research. Working drafts of this paper were presented in September 2017 at the annual conference of the British Society for Population Studies in Liverpool, United Kingdom, and in October 2016 at an international Demography and Gender workshop organized by Le Centre de recherches de l’Institut de Démographie de l’Université Paris 1 in Paris, France. 1206 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 References Addoquaye Tagoe, C. and Kwankye, S.O. (2009). Returning home and re-integrating as an independent child migrant in Ghana. In: Anarfi, J.K. and Kwankye, S.O. (eds.). Independent migration of children in Ghana. Accra: Sundel Services: 206–247. Agyei, J. and Ofosu-Mensah Ababio, E. (2009). Historical overview of internal migration in Ghana. In: Anarfi, J.K. and Kwankye, S.O. (eds.). Independent migration of children in Ghana. Accra: Sundel Services: 9–44. Anarfi, J.K. and Agyei, J. (2009). 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Estimation of migration from census data. In: Moultrie, T., Dorrington, R.E., Hill, A.G., Hill, K., Timæus, I., and Zaba, B. (eds.). Tools for demographic estimation. Paris: IUSSP: 376–389. Elias, J. (2010). Making migrant domestic work visible: The rights based approach to migration and the ‘challenges of social reproduction.’ Review of International Political Economy 17(5): 840–859. doi:10.1080/09692290903573872. Findley, S.E. (1989). Les migrations féminines dans les villes africaines: Une revue de leurs motivations et expériences. In. Antoine, P. and Coulibaly, S. (eds.). L’insertion urbaine des migrants en Afrique. Paris: ORSTOM: 55–70. Ford, K. and Hosegood, V. (2005). Aids mortality and the mobility of children in Kwazulu Natal, South Africa. Demography 42(4): 757–768. doi:10.1353/dem. 2005.0029. Frempong-Ainguah, F., Badasu D.M., and Codjoe, S.N.A. (2009). North-South independent child migration in Ghana: The push and pull factors. In: Anarfi, J.K. and Kwankye, S.O. (eds.). 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Ghana Demographic and Health Survey 2014. Accra: Ghana Statistical Service, Ghana Health Service, and the DHS Program. GSS, GHS, and ICF Macro (1994). Ghana Demographic and Health Survey 1993. Accra: Ghana Statistical Service, Ghana Health Service, and ICF Macro. GSS, GHS, and ICF Macro (2009). Ghana Demographic and Health Survey 2008. Calverton: Ghana Statistical Service, Ghana Health Service, and ICF Macro. GSS and IRD (1989). Ghana Demographic and Health Survey 1988. Accra: Ghana Statistical Service and Institute for Resource Development. GSS and Macro International (1999). Ghana Demographic and Health Survey 1998. Accra: Ghana Statistical Service and Macro International. GSS, NMIMR, and ICF Macro (2004). Ghana Demographic and Health Survey 2003. Calverton: Ghana Statistical Service, Noguchi Memorial Institute for Medical Research, and IFC Macro. Guo, M., Chow, N.W.S., and Palinkas, L.A. (2011). Circular migration and life course of female domestic workers in Beijing. 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Paris: IUSSP: 390–402. http://www.demographic-research.org 1209 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses Llácer, A., Zunzunegui, M.V., del Amo, J., Mazarrasa, L., and Bolůmar, F. (2007). The contribution of a gender perspective to the understanding of migrants’ health. Journal of Epidemiology and Community Health 61(S2): ii4–ii10. doi:10.1136/ jech.2007.061770. Moultrie, T., Dorrington, R.E., Hill, A.G., Hill, K., Timæus I.M., and Zaba, B. (2013). Tools for demographic estimation. Paris: IUSSP. Parliament of the Republic of Ghana (2016). Parliamentary debates: Official report. Accra: Parliament House. Quartey, P. and Yambilla, E. (2009). The costs and benefits of child migration in Ghana: The case of child migrants from Northern Ghana. In: Anarfi, J.K. and Kwankye, S.O. (eds.). Independent migration of children in Ghana. Accra: Sundel Services: 248–291. Resurreccion, B.P. (2009). Female migration and social reproduction in the Mekong region. Asian and Pacific Migration Journal 18(1): 101–122. doi:10.1177/ 011719680901800105. Rogers, A. and Castro, L.J. (1981). Model migration schedules. Laxenburg: International Institute for Applied Systems Analysis. Spoorenberg, T. (2015). Population estimation: Regional workshop on the production of population estimates and demographic indicators. Addis Ababa: United Nations, Department of Economic and Social Affairs, Population Division. Thiel, A. and Stasik, M. (2016). Market men and station women: Changing significations of gendered space in Accra, Ghana. Journal of Contemporary African Studies 34(4): 459–478. doi:10.1080/02589001.2017.1281385. Toma, S. and Vause, S. (2014). Gender differences in the role of migrant networks: Comparing Congolese and Senegalese migration flows. International Migration Review 48(4): 972–997. doi:10.1111/imre.12150. Tufuor, T., Niehof, A., Sato, C., and van der Horst, H. (2015). 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Legon: Regional Institute for Population Studies (RIPS) at the University of Ghana and Miami University. Zlotnik, H. (1995). Migration and the family: the female perspective. Asian and Pacific Migration Journal 4(2–3): 253–271. doi:10.1177/011719689500400205. http://www.demographic-research.org 1211 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses Appendix 1: Demographic methods This technical appendix justifies the methods we used to analyse female migration. It also details the assumptions, applications, and limitations of these methods. A-1.1 Rogers–Castro multiexponential model migration schedule Following the instructions detailed in Tools for Demographic Estimation, we fitted a Rogers–Castro multiexponential model migration schedule to observed migration data in order to represent typical age patterns of migration (Rogers and Castro 1981; Little and Dorrington 2013). These migration schedules range from 7 to 13 parameters, depending on the model’s complexity, and depict the dependency between age and migration (Little and Dorrington 2013). Checking the “shape” or age distribution of migrant flows by fitting a model migration schedule also permitted us to check our estimates of net internal female migration in Section A-3. Before applying this method, we obtained migration rates for single ages, examined the population’s age structure, and examined the relative completeness of the census counts. We assumed that (1) the census accurately counted the population by subnational region and place of birth and (2) the census identified people who moved from one region to another in the time period of interest (1995–2000). The first step in applying this method is to prepare a schedule of the observed rates. We used census data that gave the numbers of migrants who survived the five- year migration interval 1995–2000. From this data, it is possible to calculate one-year age propensities by backcasting census respondents to the region where they reported living in 1995. The age-specific out-migration propensity is calculated for each one- year age group as the ratio of migrants to the number at risk of migrating over the time period (Little and Dorrington 2013). The second step is to decide which multiexponential model best fits the data. As noted earlier (Section 4.2, Demographic structure of internal migrants), since retirement is not concentrated among specific ages in this data and the data may exaggerate older ages (Little and Dorrington 2013), we adopted the standard 7-parameter model rather than the more complex 9-, 11-, or 13-parameter models. For the third step, fitting the model using Solver, we obtained an Excel Workbook for fitting model migration schedules directly from Professor Rob Dorrington at the University of Cape Town. Our calculations for fitting this model appear in a multipage Excel Workbook that is available upon request. Then, in step four, we evaluated the model’s fit using the mean absolute percentage error statistic. At 7% for both sexes, it is within the boundaries for achieving 1212 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 a reasonable fit. We also calculated the R-squared values for males (92%) and females (89%). Both values are acceptable compared to the established threshold of 90%, indicating that the models reasonably fit the data (Little and Dorrington 2013). T- statistics are significant at the 0.05 level for all coefficients. We also checked that the age-specific migration rates were visually compatible with the Rogers–Castro model and looked for extreme values that could distort the parameters in our model. Since we employed census data for these models, they experience the limitations of census data detailed in our article (Section 5, Discussion). Furthermore, a limitation of this method is that without accurate, well-behaved data, it is possible that the model may be overparameterized if it does not produce a close fit (Little and Dorrington 2013). Since the lowest-parameter model best fitted the data, we are not concerned about overparameterization. A-1.2 Logistic regression analyses To examine the effects of demographic indicators on the likelihood of a girl or woman migrating internally in 2000 and 2010, we conducted logistic regression analyses using SPSS Statistics 22.0 software. Binary logistic regression modelled the effects of selected independent variables on whether or not a girl or woman was identified in the census as ever having migrated internally (see Table 2 for criteria used to classify migrants). International migrants were excluded. Selection of the independent variables was based on a literature review of push- and pull-factors of migration. We examined the following independent variables: age (in one-year and five-year age groups), education status (ever attended or attending school), marital status, religion, ethnicity, residence (urban, rural), work status (worked for pay, profit, or family gain; did not work), and relationship to household head. These analyses assume that the census correctly identifies all girls and women who have migrated within Ghana and that our dependent variable (ever having migrated internally) can be measured on a dichotomous scale (yes/no). We know, however, that the census questionnaires’ understanding and measuring of migration do not capture contemporary migration patterns identified via other sources of migration data. Most movements between place of birth and current residence are missing, leading to a likely undercount of internal migrants. Improving the census’s ability to capture contemporary migration patterns (e.g., cyclical migration, seasonal migration) would significantly strengthen the predictive ability of this regression model. http://www.demographic-research.org 1213 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses A-1.3 Estimates of net internal female migration from place of birth data To generate estimates of net internal female migration from census data, we followed the instructions detailed in Tools for Demographic Estimation for estimating subnational regional net in- and out-migration from place of birth data (Dorrington 2013). This estimation required the number of females, in five-year age groups, by subnational region in 2010 and by subnational region at the preceding census in 2000. For estimating deaths in this period, we calculated survival factors using model life tables from GSS (GSS 2013c). Our assumptions are as follows: 1. Ghana’s censuses correctly identify region of birth and accurately count the population by subnational region. 2. We can accurately estimate the mortality of people moving between two regions in Ghana. Before applying the method, Dorrington (2013) warns demographers to examine the data’s age structure of the population and the data’s relative completeness. As noted in our article (Section 3.1, Data), we assessed data quality and completeness by (1) reviewing the post-enumeration surveys conducted to assess coverage and content errors (GSS 2003, 2012) and (2) comparing key variables between the microdata and censuses. The microdata sample from the 2010 Census more accurately reflects the complete census than the microdata sample from 2000 in which the age structure differs slightly (Table 1). Unfortunately, the 2000 Census’s post-enumeration survey data is physically missing, preventing analysis of whether or not the final census results required adjustment. The 2010 Census required no adjustments based on the low net coverage error of 1.8% at the national level (GSS 2012). While this data is imperfect, it is the best currently available for estimating net internal migration in Ghana. Dorrington (2013) also warns demographers that the estimations are sensitive to census quality: for example, inaccurately recorded place of birth (e.g., respondent may be unaware of boundary changes or may be unaware of person’s place of birth), inability to completely identify all migrants and from where they migrated (i.e., undercount), and net migration’s underestimation of migrant flows into and out of a region. The first step in estimating net internal migration between subnational regions from place of birth data is to decide on survival factors. While we considered survival factors generated by the 2005 life table for Ghana from the World Health Organization’s (WHO) Global Health Observatory data repository (WHO 2018) (Table A-1), we ultimately used survival factors derived from the Urban Females and Rural Females model life tables produced by the Ghana Statistical Service (GSS) (2013c). 1214 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 Since we had reason to believe that mortality differed between regions, using the Urban Females and Rural Females life tables produced by the GSS permitted us to better match the mortality profiles of each region. Ten-year survival factors determined by the Urban Females model life table were used to generate migration estimates for the Greater Accra (see “5S ” in the fifth column of Table A-2) and Ashanti Regions, where the majority of girls and women reside in urban areas (90.5% and 59.6% respectively) (Figure 1). We used the GSS’s Rural Females model life table to generate ten-year survival factors used in the estimates for the other eight regions, where the rural population exceeded the urban population (see “5S ” in the fifth column of Table A-3). The second step is to use these survival factors to estimate the number of deaths that occurred between the 2000 and 2010 Censuses. The third step is to estimate the net number of in-migrants or out-migrants. Table A-1: Comparison of overall net migration estimates based on changes to survival factors Overall net migration As estimated with constant survival As estimated with separate survival Region factors for all regions, based on the factors for predominately rural or urban % difference WHO 2005 life table for Ghana regions, based on Ghana’s 2010 Censuslife tables Western –13,332 –13,711 –1.40 Central –18,117 –16,121 5.83 Greater Accra 318,278 300,213 2.92 Volta –105,237 –101,561 1.78 Eastern –74,510 –71,130 2.32 Ashanti 106,929 101,431 2.64 Brong Ahafo –12,627 –14,939 –8.39 Northern –111,108 –109,085 0.92 Upper East –47,941 –47,212 0.77 Upper West –41,916 –41,734 0.22 Table A-2 works through these steps for estimating the net number of female in- migrants. The second and third columns show the number of girls and women living in the Greater Accra Region who were born outside the region, as counted by the 2000 and 2010 Censuses. We calculated the ten-year survival factors (5S ) in the fifth column using data from the GSS (2013c) Urban Females model life table. The seventh column (Do) is the number of estimated deaths of in-migrants who were born outside that occurred in the ten years between censuses (n). We estimated deaths of people born outside the region (denoted by the superscript O) aged between x and x + 10 years at the http://www.demographic-research.org 1215 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses time of the first census (t), 5 , of those aged A–n and older at the first census, ∞ , and of those born between the censuses, , as follows: For those born between the two censuses = (5 (2010)) × ((1/ , ) − 1) = (34,950 × − 1 . = 1,410 For those aged 65 years and older at the time of the first census ∞ = (∞ (2000) × ∞ , + ∞ (2010)) × ((1/∞ , ) − 1) = ((6,630 + 4,260 + 9,520) × 0.62448 + 14,730) × − 1 . = 8,261 For all other age groups, such as those aged 30–34 years at the time of the first census 5 = (5 (2000) × 5 , + 5 (2010)) × ((1/5 , ) − 1) = (53,230 × 0.93040 + 57,480) × − 1 . = 4,002 where 5 ( ) represents the number of people born outside the region (by age group) according to the census at time t who were aged between x and x + 10 years. The final column (Net M (born out)) shows the net number of female migrants into the Greater Accra Region who were born in regions other than the Greater Accra Region for each five-year age group. From 2000 to 2010, a total of 371,632 girls and women born outside the Greater Accra Region moved to the Greater Accra Region (after excluding those who moved out). 1216 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 Table A-2: Estimation of the net number of female in-migrants of those born outside by age group, Greater Accra Region, Ghana, 2000–2010 Age 2000 2010 x 5 Age at 2nd census Do Net M (born out) B 0.92534 0–4 30,390 34,950 0 0.98072 0–4 1,410 36,360 5–9 38,460 40,280 5 0.98272 5–9 1,625 11,515 10–14 46,270 60,730 10 0.97981 10–14 890 23,160 15–19 63,980 79,870 15 0.97245 15–19 1,034 34,634 20–24 68,690 117,250 20 0.96188 20–24 1,675 54,945 25–29 69,260 119,690 25 0.94706 25–29 2,576 53,576 30–34 53,230 93,920 30 0.93040 30–34 3,170 27,830 35–39 45,660 74,330 35 0.91571 35–39 3,910 25,010 40–44 35,430 57,480 40 0.90525 40–44 4,002 15,822 45–49 26,190 44,490 45 0.89823 45–49 3,972 13,032 50–54 19,130 39,350 50 0.88747 50–54 3,738 16,898 55–59 12,360 25,560 55 0.86645 55–59 2,781 9,211 60–64 9,170 19,100 60 0.83183 60–64 2,287 9,027 65–69 6,630 11,640 65+ 0.62448 65–69 1,722 4,192 70–74 4,260 10,740 70–74 1,857 5,967 75+ 9,520 14,730 75+ 8,261 9,211 Total 538,630 844,110 Total 44,911 350,391 Table A-3 works through the steps for estimating the net number of female out- migrants. The second and third columns show the number of girls and women living in regions other than Ghana’s Upper East Region who were born in the Upper East Region, as counted by the 2000 and 2010 Censuses. We calculated the survival factors (5S ) in the fifth column using data from the GSS Rural Females model life table (2013c). The seventh column (Di) is the number of estimated deaths of out-migrants who were born inside that occurred in the ten years between censuses. It is calculated in the same manner as the deaths of in-migrants who were born outside the region (Do). The final column (Net M (born in)) shows the net number of female out-migrants of those born in the Upper East Region (i.e., the number of girls and women born in the Upper East Region who moved out, less those who have returned). From 2000 to 2010, a total of 54,966 girls and women born in the Upper East Region moved out of the Upper East Region (after excluding those who moved in). http://www.demographic-research.org 1217 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses Table A-3: Estimation of the net number of female out-migrants of those born inside by age group, Upper East Region, Ghana, 2000–2010 Age 2000 2010 x 5 Age at 2nd census Di Net M (born in) B 0.92197 0–4 10,900 8,030 0 0.96465 0–4 340 8,370 5–9 12,660 9,050 5 0.98064 5–9 383 –1,467 10–14 11,270 12,680 10 0.98033 10–14 425 445 15–19 12,240 16,370 15 0.96941 15–19 284 5,384 20–24 14,640 25,790 20 0.95095 20–24 370 13,920 25–29 14,630 23,970 25 0.93235 25–29 565 9,895 30–34 11,390 17,340 30 0.92103 30–34 806 3,516 35–39 9,160 13,470 35 0.91866 35–39 984 3,064 40–44 5,900 9,240 40 0.91618 40–44 846 926 45–49 4,680 6,670 45 0.90422 45–49 668 1,438 50–54 3,330 5,570 50 0.86801 50–54 502 1,392 55–59 2,160 2,560 55 0.78906 55–59 360 –410 60–64 2,050 2,770 60 0.66829 60–64 430 1,040 65–69 1,300 1,880 65+ 0.32150 65–69 479 309 70–74 1,100 2,290 70–74 908 1,898 75+ 2,110 3,370 75+ 5,086 5,246 Total 119,520 161,050 Total 13,436 54,966 After estimating net female in-migration and out-migration for each of Ghana’s ten regions, we combined these estimates into Table 7 of our article. While these estimations are currently the most accurate available based on existing data, they have several limitations. As previously mentioned, the quality of census data affects these estimates. Censuses may not identify all migrants and may suffer from an undercount. Additionally, place of birth data and place of residence data are affected by misreporting if boundaries change between rounds or if respondents are ignorant of the boundaries. A-1.4 Estimates of net female migration using the cohort component method To strengthen confidence in our estimates of net internal female migration from census data (Section A-1.2), we compared these estimates to those generated by the cohort component method (Spoorenberg 2015). This estimation required us to first forward- 1218 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 project the female population enumerated in the 2000 Census to 2005, based on estimated levels of age-specific fertility and mortality rates. We then forward-projected the estimated female population in 2005 to compare it with the actual female population enumerated in the 2010 Census. Without accurate vital registration statistics on fertility and mortality during these periods, we relied on estimations. For estimating fertility, we used age-specific fertility rates (ASFRs) for women aged 15–49 years (in five-year age groups) produced by the 2003 Ghana Demographic and Household Survey (GDHS) (GSS, NMIMR, and ICF Macro 2004) and the 2008 GDHS (GSS, GHS, and ICF Macro 2009). We applied the urban ASFRs to the Greater Accra and Ashanti Regions and the rural ASFRs to the eight remaining regions. For estimating deaths in this period, we calculated survival factors using WHO model life tables for Ghana (WHO 2018). For 2000–2005, we used the life table for 2003. For 2005–2010, we used the life table for 2008. Our assumptions are as follows: 1. Life table survival rates are representative of mortality conditions during the intercensal period, and we can accurately estimate mortality. 2. Fertility rates are representative of fertility during the intercensal period, and we can accurately estimate fertility. 3. Female migrants have the same fertility and mortality levels as the enumerated population. 4. The distribution of net migrants is equal across years during the intercensal period. 5. Differences between our projected population in 2010 and the population enumerated in the 2010 Census result from migration. The first step in estimating net migration using this method was to forward-project the females enumerated in the 2000 Census five years to 2005 (Table A-4). Next, we estimated the total number of surviving female births from 2000 to 2005 (Table A-5). Then, we repeated the process by forward-projecting the projected female population in 2005 to 2010 and estimating surviving female births from 2005 to 2010. Finally, we compared our estimated female population in 2010 to the actual enumerated female population in 2010. Differences between these figures imply in-migration or out- migration. Table A-4 works through the steps for forward-projecting the female population in the projection intervals. The first column after age group shows the female population (in five-year age groups) residing in the Upper East Region, as counted by the 2000 Census. The next column lists the five-year survival factors that we derived from the WHO life table for Ghana in 2003. The product of these two columns is the projected http://www.demographic-research.org 1219 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses population in 2005; however, there is one exception. The projected population for the age group 0–4 years comes from Table A-5, in which we estimated female births surviving the projection interval 2000–2005. We repeat these steps once more to project the 2005 population forward to 2010. Finally, we estimate net female migration by subtracting the projected population in 2010 from the population enumerated in the 2010 Census. From 2000 to 2010, the Upper East Region experienced negative net migration, with a total of 75,346 girls and women moving out of the region. Table A-4: Estimating net intercensal female migration by age (birth) cohorts, according to the cohort component method, in the Upper East Region, Ghana, 2000–2010 Five-year life Projected Five-year life Age group Population, table survival population, table survival Projected Population, Estimated net (in years) 2000 Census ratio 2005 ratio population, 2010 2010 Census migrants (1) (2) (3) = (1) x (2) (4) (5) = (3) x (4) (6) (7) = (6) – (5) 0–4 66,440 0.93043 85,338 0.93923 96,152 68,450 –27,702 5–9 75,250 0.97342 61,818 0.97818 80,152 73,600 –6,552 10–14 51,260 0.98795 73,250 0.99020 60,469 64,850 4,381 15–19 40,840 0.99121 50,643 0.99181 72,532 54,020 –18,512 20–24 33,840 0.98779 40,481 0.98901 50,228 42,050 –8,178 25–29 35,770 0.97855 33,427 0.98357 40,036 37,640 –2,396 30–34 29,190 0.96822 35,003 0.97475 32,878 32,840 –38 35–39 26,830 0.96136 28,262 0.96519 34,119 29,180 –4,939 40–44 23,800 0.95851 25,793 0.96027 27,278 26,570 –708 45–49 21,870 0.95902 22,813 0.96067 24,769 20,340 –4,429 50–54 18,020 0.95498 20,974 0.95746 21,915 19,450 –2,465 55–59 11,990 0.94552 17,209 0.94846 20,081 11,510 –8,571 60–64 13,240 0.91340 11,337 0.92161 16,322 14,580 –1,742 65–69 8,980 0.85251 12,093 0.86934 10,448 9,350 –1,098 70+ 19,670 0.61137 19,681 0.62723 22,858 30,460 7,602 Total 476,990 538,121 610,236 534,890 –75,346 Notes: Figures in bold were produced using the estimation method for female births surviving the projection interval, as shown in Table A-1.5. Table A-5 works through the steps for estimating female births surviving the projection intervals. The first column shows the female population aged 15–49 years (in five-year age groups) residing in the Upper East Region, as counted by the 2000 Census. The second column shows the projected female population in 2005, based on our calculations in Table A-4. The third column calculates the mid-period female 1220 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 population as an average of the sum of the populations in the first and second columns. ASFRs in the fourth column come directly from the 2003 GDHS, in this example, and are those used for rural areas. The final column, estimated births (2000–2005), is the product of the female mid-period population and the ASFRs multiplied by five (years) to account for the period 2000–2005. For the first interval (2000–2005), we used a sex ratio of 105 for both urban and rural areas based on the 2000 Census report (GSS 2003). For the second interval (2005–2010), we used rural (103.1) and urban (101.2) sex ratios from the 2010 Census report on fertility (GSS 2014). We generated newborn five-year survival ratios using the WHO 2003 and 2008 life tables for Ghana (WHO 2018). From 2000 to 2005, we estimated 85,338 surviving female births in the Upper East Region. This figure goes into the first row (age group 0–4 years) of the fourth column (Projected population, 2005) in Table A-4. Table A-5: Estimation of female births surviving the projection interval, Upper East Region, Ghana, 2000–2005 Female population, Female population, Female population, Age-specific Estimated births Age group 2000 census 2005 projected mid-period fertility rates (2000–2005) (in years) (1) (2) (3) = ((1) + (2)) / 2 (4) (5) = 5 x ((3) x (4)) 15–19 40,840 50,643 45,741 0.113 25,844 20–24 33,840 40,481 37,161 0.225 41,806 25–29 35,770 33,427 34,598 0.256 44,286 30–34 29,190 35,003 32,096 0.213 34,183 35–39 26,830 28,262 27,546 0.179 24,654 40–44 23,800 25,793 24,797 0.095 11,778 45–49 21,870 22,813 22,341 0.049 5,474 Total births 188,024 Proportion of female births (sex ratio, rural = 105) 0.488 Total female births (2000–2005) 91,719 Average five-year survival ratio of newborns 0.930 Expected deaths among female births (2000–2005) 6,381 Total surviving female births 85,338 The estimates produced using the cohort component method have several limitations beyond the quality of census data. This method is incredibly sensitive to our estimated fertility and mortality rates. Using ASFRs from the GDHS and censuses produced drastically different estimates (Table A-6). ASFRs from the GDHS produced overall net out-migration in six of Ghana’s ten regions, whereas ASFRs from the censuses produced overall net out-migration in only two of Ghana’s ten regions. Since http://www.demographic-research.org 1221 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses measures between the 2008 GDHS and 2010 Census indicate misreporting of births in the census and census fertility data of questionable reliability, we felt the GDHS ASFRs produced more robust estimates. The mortality rates illustrated less significant swings in the estimates produced using the cohort component method, depending on where we generated the survival rates from. For this reason, we consider our estimations of subnational regional net in- and out-migration from place of birth data (Section A-1.3) to be more robust, as they are affected only by mortality estimates. Table A-6: Comparison of estimates of net female migration in Ghana produced using different methods Overall net female migration As estimated with the As estimated with the As estimated with the cohort component cohort component method cohort component method As estimated with place Region method using ASFRs using urban/rural ASFRs using ASFRs from the 2003 of birth data (Section from the 2000 and 2010 from the 2003 and 2008 and 2008 GDHS with A-1.3) Censuses GDHS additional modifications* Western 332 –80,102 –80,102 –13,711 Central 118,650 51,291 33,360 –16,121 Greater Accra 367,656 308,633 308,633 300,213 Volta 54,411 –13,143 –13,143 –101,561 Eastern 27,725 –57,576 –57,576 –71,130 Ashanti 456,663 389,721 389,721 101,431 Brong Ahafo 42,939 –33,492 –33,492 –14,939 Northern 132,650 70,086 –44,247 –109,085 Upper East –40,570 –75,346 –75,346 –47,212 Upper West –24,367 –47,997 –47,997 –41,734 Notes: * Women in the Northern Region have the highest total fertility rate (TFR) in Ghana, with 7 children per woman in 2003 and 6.8 children per woman in 2008 (GSS, NMIMR, and ICF Macro 2004, GSS, GHS, and ICF Macro 2009). The Central Region also experiences above average fertility with TFRs of 5 children per woman in 2003 and 5.4 children per woman in 2008 (GSS, NMIMR, and ICF Macro 2004, GSS, GHS, and ICF Macro 2009). To improve the accuracy of our migration estimates using the cohort component method, we adjusted the ASFR upwards when estimating births in these two regions. For estimating births from 2005 to 2010, we multiplied the rural ASFRs by a factor of 1.39 for the Northern Region and a factor of 1.1 for the Central Region. These factors are the ratio of each region’s TFR to Ghana’s overall rural TFR of 4.9. For estimating births from 2000 to 2005, we adjusted the Northern Region’s ASFRs upward using a factor of 1.25. 1222 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 Appendix 2: Supplementary tables Table A-7: Migrants identified by Ghana census questions on migration, 2000 and 2010 (10% microdata) 2000 Census questions Migrants identified in 2000 (%), Migrants identified in 2010 (%),by sex 2010 Census questions by sex P06a BORN IN THIS 335,951 of 955,504 females (35.2%) P05 BIRTHPLACE: Was 450,071 of 1,262,598 females (35.6%) TOWN/VILLAGE: Was Ghanaian female migrants = 274,167 (NAME) born in this 412,035 of 1,203,691 males (34.2%) (NAME) born in this town (81.6%) town/village? If Yes, go or village? If YES go to International foreign female migrants to P07. P07. = 61,784 (18.4%) [Note: Only asked of respondents who were 349,023 of 935,654 males (37.3%) Ghanaian by birth.] Ghanaian male migrants = 262,911 (75.3%) International foreign male migrants = 86,112 (24.7%) P06b BIRTHPLACE 274,167 of 274,167 females (100%) P06 BIRTHPLACE: In 450,071 of 450,071 females (100%) OUTSIDE THIS Female internal migrants = 265,153 what region or country Female internal migrants = 434,948 TOWN/VILLAGE: In what (96.7%) was (NAME) born? (96.6%) region or country was Female (Ghanaian) international Female international migrants = 15,123 (NAME) born? migrants = 9,014 (3.3%) (3.4%) [Note: Only asked of 262,911 of 262,911 males (100%) 412,035 of 412,035 males (100%) respondents who were Ghanaian by birth.] Male internal migrants = 254,048 Male internal migrants = 394,703 (96.6%) (95.8%) Male (Ghanaian) international Male international migrants = 17,332 migrants = 8,863 (3.4%) (4.2%) P07 USUAL PLACE OF 28,679 of 955,504 females (3%) P07 LIVING IN THIS 478,783 of 1,262,598 females (37.9%) RESIDENCE: In what Female internal migrants = 28,329 TOWN/VILLAGE: Has 439,930 of 1,203,691 males (36.5%) district is (NAME’S) usual (98.8%) (NAME) been living in residence? Female international migrants = 350 this village or town since (1.2%) birth? If Yes, go to P09. 29,797 of 935,654 males (3.2%) Male internal migrants = 29,338 (98.5%) Male international migrants = 459 (1.5%) P08 PLACE OF 187,027 of 816,989 females (19.6%) P08 NUMBER OF 451,686 of 1,262,598 females (35.8%) RESIDENCE FIVE Female internal migrants = 185,228 YEARS LIVED IN THIS 413,681 of 1,203,691 males (34.4%) YEARS AGO IF (NAME) (99%) TOWN/VILLAGE: For IS FIVE YEARS OR Female international migrants = how long has (NAME) OLDER: In what district 1,799 (1%) been living in this village was (NAME’S) usual 189,490 of 935,654 males (20.3%) or town? place of residence five years ago? Male internal migrants = 187,194 (98.8%) Male international migrants = 2,296 (1.2%) Total number of migrants identified in Total number of migrants identified in 2000 microdata, by sex: 2010 microdata, by sex: 359,960 of 955,504 females (37.7%) 487,376 of 1,262,598 females (38.6%) Female internal migrants = 297,031 Female internal migrants = 472,253 (31.1%) of all females (37.4%) of all females Female international migrants = Female international migrants = 15,123 62,929 (6.6%) of all females (1.2%) of all females 371,577 of 935,654 males (39.7%) 447,485 of 1,203,691 males (37.2%) Male internal migrants = 284,269 Male internal migrants = 430,153 (30.4%) of all males (35.7%) of all males Male international migrants = 87,308 Male international migrants = 17,332 (9.3%) of all males (1.4%) of all males http://www.demographic-research.org 1223 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses Table A-8: Lifetime female in-migrants by region of origin, out-migrants by region of destination, and net lifetime migration streams, Ghana, 2000 and 2010 2000 Census 2010 Census Region of origin and Lifetime in- Lifetime out- Net lifetime Lifetime in- Lifetime out- Net lifetime destination migrants migrants migration migrants migrants migration Western 239,600 87,570 152,030 260,940 145,370 115,570 Central 93,920 239,510 –145,590 185,660 318,530 –132,870 Greater Accra 548,090 99,020 449,070 844,110 156,690 687,420 Volta 55,310 263,130 –207,820 73,670 343,070 –269,400 Eastern 157,800 276,400 –118,600 207,770 388,770 –181,000 Ashanti 275,470 221,720 53,750 432,430 302,070 130,360 Brong Ahafo 168,770 102,940 65,830 217,110 172,800 44,310 Northern 54,980 121,000 –66,020 52,900 214,690 –161,790 Upper East 24,390 118,540 –94,150 30,640 161,050 –130,410 Upper West 18,140 106,640 –88,500 21,630 123,820 –102,190 Total 1,636,470 1,636,470 0 2,326,860 2,326,860 0 Table A-9: Lifetime male in-migrants by region of origin, out-migrants by region of destination, and net lifetime migration streams, Ghana, 2000 and 2010 2000 Census 2010 Census Region of origin and Lifetime in- Lifetime out- Net lifetime Lifetime in- Lifetime out- Net lifetime destination migrants migrants migration migrants migrants migration Western 262,520 81,550 180,970 300,660 130,280 170,380 Central 92,160 234,820 –142,660 186,880 292,890 –106,010 Greater Accra 530,700 106,930 423,770 756,850 164,430 592,420 Volta 54,470 265,580 –211,110 71,190 340,920 –269,730 Eastern 156,980 270,710 –113,730 206,480 359,620 –153,140 Ashanti 296,640 222,440 74,200 418,030 313,050 104,980 Brong Ahafo 191,180 104,720 86,460 242,520 164,200 78,320 Northern 53,650 133,190 –79,540 48,160 222,990 –174,830 Upper East 25,040 136,250 –111,210 31,000 167,780 –136,780 Upper West 15,490 122,640 –107,150 21,840 127,450 –105,610 Total 1,678,830 1,678,830 0 2,283,610 2,283,610 0 1224 http://www.demographic-research.org Demographic Research: Volume 39, Article 44 Table A-10: Estimates of the net number of female in-migrants of those born outside by age group, Ghana, 2000–2010 Net in-migration by region Age Western Central GreaterAccra Volta Eastern Ashanti Brong Upper Upper Ahafo Northern East West 0–4 14,435 12,723 36,360 6,209 10,905 22,305 12,166 4,150 2,973 2,028 5–9 –4,145 4,389 11,515 –202 1,934 –2,869 383 –1,771 234 –1,753 10–14 –3,555 6,799 23,160 –338 3,252 7,882 532 –2,841 –82 –2,158 15–19 –996 12,709 34,634 –362 8,352 18,632 4,793 –275 1,324 –1,561 20–24 11,244 12,676 54,945 71 7,763 34,082 11,923 656 196 –374 25–29 8,227 10,342 53,576 747 7,080 28,664 10,100 771 825 –1,482 30–34 1,106 6,620 27,830 368 3,714 17,041 4,532 –195 324 –1,117 35–39 2,434 6,133 25,010 –255 4,713 13,139 3,773 –531 416 –1,602 40–44 1,112 4,223 15,822 633 4,970 9,440 3,183 –115 176 –1,048 45–49 3,190 3,853 13,032 –110 4,104 6,666 2,561 –383 46 –552 50–54 3,690 4,033 16,898 876 4,687 7,931 3,306 518 233 –438 55–59 –505 1,237 9,211 –404 985 2,741 –34 –459 –70 –461 60–64 1,930 2,191 9,027 475 2,364 4,056 2,304 359 208 –115 65–69 98 796 4,192 –351 189 577 –136 –141 14 –337 70–74 1,776 1,470 5,967 409 2,371 4,894 2,968 347 79 –229 75+ 2,166 1,579 9,211 419 3,624 5,592 2,280 571 –72 –643 Total 42,208 91,774 350,391 8,186 71,007 180,774 64,635 662 6,823 –11,844 http://www.demographic-research.org 1225 Lattof et al.: Contemporary female migration in Ghana: Analyses of the 2000 and 2010 Censuses Table A-11: Estimates of the net number of female out-migrants by region of birth and age group, Ghana, 2000–2010 Net out-migration by region Age Western Central GreaterAccra Volta Eastern Ashanti Brong Upper Upper Ahafo Northern East West 0–4 8,804 15,223 14,731 14,866 17,387 17,114 10,317 11,588 8,436 6,051 5–9 1,376 244 2,739 –1,250 1,899 577 3,340 2,173 –1,392 –1,762 10–14 4,221 4,451 2,044 3,305 6,238 2,865 4,857 5,955 380 –1,272 15–19 7,113 8,556 5,448 8,451 9,453 5,384 7,094 14,071 5,542 3,033 20–24 9,215 14,769 6,808 14,832 18,058 14,897 13,556 20,691 14,284 7,567 25–29 6,734 13,343 5,101 17,184 21,035 11,459 12,956 16,897 10,333 6,055 30–34 3,871 7,619 2,524 9,009 11,223 4,429 6,432 11,386 3,884 2,276 35–39 3,505 9,254 3,189 7,274 9,337 4,314 6,513 6,710 3,375 2,110 40–44 1,939 6,155 3,170 5,856 8,351 2,910 3,993 5,775 1,204 817 45–49 1,814 4,646 2,108 5,289 7,786 2,959 3,616 3,260 1,741 441 50–54 2,407 7,506 1,588 7,300 9,104 5,416 3,108 3,467 1,661 1,265 55–59 1,490 2,234 –79 2,327 4,471 1,080 1,273 291 –264 271 60–64 1,470 3,902 420 4,105 5,750 2,693 816 1,911 1,078 1,268 65–69 176 1,311 –332 1,511 1,843 265 454 –26 189 –95 70–74 3,006 3,362 783 3,917 4,193 1,859 694 2,202 1,463 1,037 75+ –1,221 5,320 –63 5,769 5,758 1,124 556 3,396 2,120 828 Total 55,919 107,894 50,179 109,747 141,887 79,344 79,573 109,747 54,035 29,890 1226 http://www.demographic-research.org