The low productivity of agricultural crops is among the factors leading to low income and food insecurity for rural people in the Southern Zone of Tanzania. The use of improved seeds is one way of increasing the productivity of agricultural crops. It was realized that the seed supply pipeline...

"The author critically reviews the methods available for the ex-post counterfactual analysis of programs that are assigned exclusively to individuals, households, or locations. The discussion covers both experimental and non-experimental methods (including propensity-score matching,...