CULTURAL IDENTITY AND KNOWLEDGE CREATION IN COSMOPOLITAN CITIES*
研究文化群体在城市间的互动如何影响城市体系，发现当远程沟通容易时群体倾向于融合于多元文化城市，否则会隔离在不同城市，且融合可能更优。
ABSTRACT We study how the city system is affected by the possibility for the members of the same cultural diaspora to interact across different cities. In so doing, we propose a simple two‐city model with two mobile cultural groups. A localized externality fosters the productivity of individuals when groups interact in a city. At the same time, such interaction dilutes cultural identities and reduces the consumption of culture‐specific goods and services. We show that the two groups segregate in different cities when diaspora members find it hard to communicate at distance whereas they integrate in multicultural cities when communication is easy. The model generates situations in which segregation is an equilibrium but is Pareto dominated by integration.