What determines the distributions of skills, occupations, and industries across cities? We develop a theory to jointly address these fundamental questions about the spatial organization of economies. Our model incorporates a system of cities, their internal urban structures, and a...

Leading empiricists and theorists of cities have recently argued that the generation and exchange of ideas must play a more central role in the analysis of cities. This paper develops the first system of cities model with costly idea exchange as the agglomeration force. Our model replicates a...

We study how preferences over the demographic composition of co-patrons affects income segregation in shared spaces. To distinguish demographic preferences from tastes for other venue attributes, we study venue choices within business chains. We find two notable regularities: preferences for...