A Model of Social Interactions and Endogenous Poverty Traps. Rationality and Society

JEL No. J0 This paper develops a model of social interactions and endogenous poverty traps. The key idea is captured in a framework in which the likelihood of future social interactions with members of one’s group is partly determined by group-specific investments made by individuals. I prove three main results. First, some individuals expected to make group-specific capital investments are worse off because their observed decision is used as a litmus test of group loyalty — creating a tradeoff between human capital and cooperation among the group. Second, there exist equilibria which exhibit bi-polar human capital investment behavior by individuals of similar ability. Third, as socia