Estimating the impact of farmer field schools in sub-Saharan Africa: the case of cocoa

摘要

This study measures the economic impact of the first phase of the Cocoa Livelihood Program (CLP-I), a current World Cocoa Foundation (WCF) project, sponsored by the Bill and Melinda Gates Foundation and aimed at improving the livelihood of over 200,000 small cocoa producers in sub-Saharan Africa via training, crop diversification, and farmer-based organizations. Using data collected from 2,048 pre- and post-CLP-I interviews of cocoa producers in Ghana, Cote d'Ivoire, Nigeria, and Cameroon, the results show that yield enhancements attributable to CLP-I are 32%, 34%, 50%, and 62% in Ghana, Cote d'Ivoire, Nigeria, and Cameroon, respectively. Using a total program cost of $151-$200 per beneficiary and estimated annual benefits of $109-$322 per beneficiary over 25 years, the benefit-cost ratios are estimated to range from $18 to $62 for every dollar spent on human capital development. These results suggest the WCF should endeavor to increase the number of farmers who receive all, not some, of the components of the program. This would not only help ensure that each producer obtains as much human capital as possible from each of the training programs but increases the probability of reaching the CLP goal of doubling the income of cocoa-growing households.