Normally, economists take the size of countries as an exogenous variable which does need to be explained. Nevertheless, the borders of countries and therefore their size change, partially in response to economic factors such as the pattern of international trade. Conversely, the size of...

This paper provides a formal model of endogenous country formation and of choice of defense spending in a world with international conflict. The model is consistent with three observations. First, secessions and, more generally, break-up of countries should follow a reduction in the likelihood...

This paper studies the equilibrium determination of the number of countries in different political regimes, and in different economic environments, with more or less economic integration. The authors focus on the trade-off between the benefits of large jurisdictions and the costs of...