Abstract
The paper studies land productivity effects of the training and visit (T&V) system of agricultural extension in Kenya, taking into account other determinants of crop yields such as the schooling of farmers and characteristics of agro‐ecology. The T&V system was incorporated in Kenya’s national system of agricultural extension in 1982 as a strategy for raising farm yields. The data we use to evaluate its performance were collected by the Government of Kenya in 1982 and 1990, but the estimation results reported in the paper are based primarily on the 1982 data set. The sample used for estimation contains information about crop production, agricultural extension workers (exogenously supplied to farms), educational attainment of farmers, usage of farm inputs, among others. A quantile regression technique was used to investigate productivity effects of agricultural extension and other farm inputs over the entire conditional distribution of farm yield residuals.