Does a cassava research-for-development program have impact at the farm level? Evidence from the Democratic Republic of Congo
Rusike, Joseph | Mahungu, N.M. | Lukombo, S. | Kendenga, Toussaint | Bidiaka, S. | Alene, A. | Lema, A. | Manyong, Victor M.
This paper evaluates the impact of a cassava research-for-development program on farm level outcomes.The program was implemented in the Democratic Republic of Congo from 2001 to 2009. We apply pro-pensity score matching, Rosenbaum bounds on treatment effects, Altonji et al. method of selection onobservables and unobservables and endogenous switching regression to farm survey data collected dur-ing the 2009 cropping season. We use these methods to test whether the R4D program has a statisticallysignificant effect on outcomes of interest and if these are not driven by selection on unobservables. Usingpropensity score matching, we find statistically significant positive effects on household participation incassava markets, adoption of improved varieties and crop management practices and household foodadequacy; and no statistically significant effects on yields and profits. The results show that bias dueto selection on unobservables is not severe enough to invalidate the impact estimates. Bias may stillbe a problem that is present in the analysis. But there is evidence that it is not substantial. Althoughthe program does not have a statistically significant positive effect on yields and profits, the significantprogram effects on market participation, variety adoption, and food adequacy merit further promotionof the program since these positive outcomes tend to be pre-conditions for realizing long-term yieldand profit benefits.
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Эту запись предоставил International Livestock Research Institute