Economic returns to cowpea research, extension, and input distribution in Senegal
计算了塞内加尔豇豆研究、推广和投入品分配项目的回报率在31%到92%之间，表明针对次要作物的适度资助项目可以成功，且关注短周期品种以应对饥饿季节能提高效果。
ABSTRACT This paper calculates the rate of return to a set of cowpea research, extension and distribution projects in Senegal to be between 31% and 92%. The results show that a modestly funded program on a secondary crop can be successful. They also indicate that programs may increase their effectiveness by addressing specific household needs – in this case, by focusing on short‐cycle varieties that provide food during the hunger season prior to the traditional harvest.