Impact of Producer Price-Related Reforms on the Cocoa Sector of Ghana from 1920 TO 2022

Abstract

Ghana’s cocoa industry has been the backbone of its agricultural economy for more than a century, providing employment, foreign exchange, and rural livelihoods. This study assesses the impact of producer price-related reforms on Ghana's cocoa sector, focusing on their influence on farmers' producer prices, the proportion of free-on-board (FOB) prices paid to farmers, price volatility, and cocoa output. This study provides critical insights into the dynamics of producer price reforms and their implications for policy and cocoa sector sustainability. Using annual data from 1920 to 2022, the analysis spans nine reform periods: the Colonial and free market era (1920-1946), the Cocoa Marketing Board (CMB) (1947 1951), Pre-Republic era (1952-1956), Nkrumah era (1957-1965), Downturn era (1966-1983), average production cost (COP) era (1984-1997), Negotiation era (1998-2000), Net FOB era(2001-2018) and the LID era (2019-2022). Data analysis employed R, Gauss, Gretl, and Microfit software, utilizing Bayesian structural time series for causal impact assessment, the Relative Price Index (RPI) for FOB price proportion, adjusted absolute mean deviation (AMAD) for price volatility, and the Autoregressive Distributed Lag (ARDL) model for long run effects on cocoa output. The results show that market-oriented reforms yielded the strongest price incentives. The RPI, representing the farmers’ share of the export price, averaged 65.23% during the Colonial era, 49.01% under the Cocoa Marketing Board (CMB) era, 50.19% in the Pre-Republic era, 64.59% during the Nkrumah era, 66.21% in the “Downturn” era, 49.92% in the Cost of Production (COP) era, 82.08% under the Negotiation era, 65.81% during the Net FOB era, and 72.71% during the Living Income Differential (LID) era. These figures indicate a general improvement in the farmers’ share of export earnings over time, particularly under liberalised and negotiated pricing mechanisms. Causal impact analysis further revealed that producer prices increased by 4.6% during the Negotiation reform, 7.2% under the Net FOB reform, and only 0.66% during the LID era, suggesting that recent reforms have had limited effectiveness despite pro-poor intentions. Volatility analysis showed that price instability was highest during the Colonial and CMB eras (ranging between 40-70%) and lowest during the Net FOB and COP reforms (8.46% and 28.04%, respectively), highlighting the stabilising effects of reforms that aligned domestic pricing with global market mechanisms. The long-run ARDL estimates confirmed that Ghana’s cocoa supply remains price-inelastic, with a producer price elasticity of 0.259 (p = 0.069), implying that a 1% increase in the real producer price raises cocoa output by just 0.26%. Rainfall (2.238; p = 0.022) exerted the strongest positive long-run effect, underscoring the dependence of production on climatic conditions. The trend coefficient (0.018; p = 0.000) suggests a gradual productivity gain over time. Among reform dummies, the Nkrumah era (0.473; p = 0.037) had a significant positive long-run impact, attributed to state investment in farm rehabilitation, extension services, and cooperative development. In contrast, the CMB (−0.254) and LID (−0.464) periods exhibited negative coefficients, implying weaker output responses under excessive central control and no policy transmission. The El Niño variable (−0.524; p = 0.051) revealed a dampening effect on output, highlighting Ghana’s vulnerability to extreme weather. Cocobod should enhance the role of producer organizations, cooperatives, and civil society in price determination and promoting local value addition and processing. National regulators should undertake a comprehensive review of existing pricing arrangements along the cocoa value chain to identify inefficiencies and areas of rent loss. Also, attention should be given to the forward sales system, which determines export prices and indirectly influences farmgate prices. By revisiting this mechanism could help ensure that producers capture a greater share of the global cocoa price and benefit more directly from price upswings.