Measuring factor productivity has been important in economics since its early days as a scientific discipline for a number of reasons. The first is the availability of systematically collected agricultural data after World War I, which allowed researchers to motivate and test newly developed...

Tanzania is among the many African countries that have engaged in agricultural liberalisation since the mid-1980s, in the hope that reforms which introduce price incentives and efficient marketing will encourage producers to respond. This paper assesses that claim by examining the supply...