How do social group boundaries evolve? Does the appearance of a new outgroup change the ingroup's perceptions of other outgroups? We introduce a conceptual framework of context-dependent categorization, in which exposure to one minority leads to recategorization of other minorities as in- or...

Analyses of ethnic and racial wage differentials neglect the fact that minorities cluster in urban and in more deprived areas. This paper estimates ethnic wage differentials by comparing minorities to the majority in the same local labour market and therefore facing similar socio-economic...

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...