All the rate of return estimates, regardless of methodology or the level of aggregation, are entirely consistent and logical. The returns show that the ARC has been extremely successful economically and has followed a sound strategy of exploiting spillovers from foreign R&D systems. However,...

This study is an investigation of convergence in per capita incomes and total factor productivity (TFP) for agriculture in the African continent. The concept of convergence, which is a basic prediction of the neoclassical growth model, has been shown to have considerable explanatory power. Here,...