英文文献：Impact Assessment of Technologies That Mitigate Adverse Circumstances: The Case of Disease-Resistant Beans in Honduras
英文文献作者：Mather, David,Oehmke, James F.
英文文献摘要：
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 predicting imputed traditional variety yields of RV users.