We present a theoretical model of moral hazard and adverse selection in an imperfectly competitive loans market that is suitable for application to Africa. The model allows for variation in both the level of contract enforcement (depending on the quality of governance) and the degree of market...

We define and axiomatically characterize an index of ethnic stratification that measures the extent to which the hierarchy in socio-economic positions across the individuals of a society follows ethnolinguistic lines. This index generalizes the idea of between-group inequality to situations...

Ethnically diverse countries are more prone to conflict, but why do some groups engage in conflict while others do not? I show that civil conflict is explained by ethnic groups' cultural distance to the central government: an increase in cultural distance, proxied by linguistic distance,...