We examine whether the Phelps-Koopmans theorem is valid in models with nonconvex production technologies. We show by example that a nonstationary path that converges to a capital stock above the smallest golden rule may indeed be efficient. This finding has the important implication that...

Existing literature explains persistent inequality either by ongoing shocks to abilities or preferences, or by a combination of technological indivisibilities, capital market imperfections and ad hoc assumptions concerning savings behavior. We focus on the role of pecuniary externalities -...

This paper studies human capital investment in a spatial setting with interpersonal complementarities. A mixture of local and global social interactions affects the cost of acquiring education, and the return to human capital is determined endogenously in the market. We study how spatially...

This paper examines the impact of ethnic divisions on conflict. The analysis relies on a theoretical model of conflict (Esteban and Ray, 2010) in which equilibrium conflict is shown to be accurately described by a linear function of just three distributional indices of ethnic diversity: the Gini...