Empirical evidence illustrates that diversity generates both economic costs and benefits. This paper develops a theoretical model that accounts for the positive and deleterious effects of heterogeneity. First, an expanded Solow Growth Model demonstrates that the direct effects of diversity can...

In this paper I present a simple model of technology adoption in agriculture in an exogenous as well as in an endogenous adoption framework. The model implies that an optimal technological gap between technological leaders and followers will persist. Full convergence or catch-up will never take...

I discuss the dynamics of growth and structural change in a two- sector dual economy characterized by a positive relationship between nutrition and productivity. A rise in agricultural production increases food consumption as well as labor productivity. The different outcomes are discussed when...