This study analyzes returns to investments in Niger's research and technology transfer system for millet, sorghum, and cowpea between 1975 and 1991. Sixty-eight percent of the country's public-sector outlays for agricultural research and 58% of its agricultural researchers were devoted to...

A wide variety of multilateral and bilateral agencies, private sector firms, and African governments have a need for high quality, reliable data on agricultural productivity. This paper identifies numerous situations where poor data lead to incorrect estimates of African land and labor...