英文文献：Estimating the impact of climbing bean adoption on bean productivity in Rwanda: Endogenous Switching Regression-估计攀缘豆的采用对卢旺达豆产量的影响:内生转换回归
英文文献作者：Katungi, Enid,Larochelle, Catherine,Mugaboo, Josephat,Buruchara, Robin
英文文献摘要：
This paper investigates the determinants of the decision to switch from cultivating bush to high yielding climbing beans and estimates the causal impact of adoption of climbing beans on productivity based a nationally representative sample of bean producing households. An endogenous switching regression model is used to account for the endogenous nature of adoption and accurately quantify the differences in productivity between climbing and bush bean technologies. Adoption of climbing bean varieties substantially increased over the past 15 years. Elevation, rainfall, and cropping systems are important determinants of adoption of climbing beans. Adoption of climbing beans increases productivity by 21 percent among adopters compared to 48 percent for non-adopters.

本文以一个具有全国代表性的大豆生产家庭为样本，研究了从种植灌木转向高产攀缘豆的决定因素，并估计了攀缘豆的采用对产量的因果影响。内生切换回归模型用于解释采用的内生性质，并准确量化攀登技术和灌木豆技术之间的生产率差异。在过去的15年里，攀缘豆品种的采用大幅度增加。海拔、降雨和种植制度是采用攀缘豆的重要决定因素。采用攀缘豆可以使采用者的生产力提高21%，而不采用者的生产力只有48%。