The aim of this paper is to show that both location and race matter for explaining the high criminality rate in cities. In our model, blacks and whites are identical in all respects. However, if, for no economic but for extrinsic reasons, everybody (including blacks) believes that blacks are...

This paper presents a theoretical and empirical study of the differentiation of labor. It is based on the relation between the division of labor existing within firms and the differentiation of the firms themselves, according to the tasks performed by their workers. The internal division of...

An overlapping generations model of social security with labor and capital productivity shocks and demographic shocks is studied.