Fertilizer use in Africa as compared to other developing regions has been limited. What types of policies and programs are needed to realize the potential benefits of fertilizer in African agriculture? This book summarizes key lessons learned from past efforts to promote fertilizer in Africa,...

Constructing appropriate counterfactual scenarios is an ongoing challenge for impact assessment of agricultural research. Using farm-level survey data from Honduras, this paper adapts the Heckman two-step procedure to construct the counterfactual to resistant variety (RV) bean yields by...