Identity, Community and Segregation

I develop a framework to explain why identity divides some communities and not others. An identity group is defined as a group of individuals with the same `culture'. A community is divided when different identities are socially segregated; a community is integrated when there is no social segregation between different identities. I find three possible outcomes for a community: assimilation, where groups socially integrate and one group conforms to the culture of another; non-assimilative integration, where groups integrate but individuals retain their own identity; and segregation, where groups socially segregate and retain their own culture. I find that certain community environments encourage segregation: (i) communities with similar sized identity groups; (ii) larger communities; (iii) communities with greater cultural distance between identities. Further, when segregation occurs, the cultural divide between the two groups can increase endogenously beyond ex-ante differences.