We develop a model where workers both choose their residential location (geographical space) and social interactions (social space). In equilibrium, we show under which condition the majority group resides close to the job center while the minority group lives far away from it. Even though the...

We study how the level of trade costs and the intensity of competition interact to explain the nature and intensity of trade within a given industry and the location of firms across countries. As trade costs decrease from very high to very low values, the global economy moves from autarky to...

This paper analyzes an irreversible “where-and-when” investment decision, in which a govern- ment must decide not only when to invest in income-increasing infrastructure but also where to make the investment, doing so under imperfect observability of the investment gains. The two models...