This paper develops a model of the breakup or unification of nations. In each nation the decision to separate is taken by majority voting. A basic trade-off between the efficiency gains of unification and the costs in terms of loss of control on political decisions is highlighted. The model...

We find that genetic distance, a measure associated with the time elapsed since two populations' last common ancestors, has a statistically and economically significant effect on income differences across countries, even controlling for measures of geographical distance, climatic differences,...

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...

Political constitutions are incomplete contracts and, therefore, leave room for abuse of power. In democracies, elections are the primary mechanism for disciplining public officials, but they are not sufficient. Separation of powers between executive and legislative bodies also helps to prevent...

We propose an origination-and-contingent-distribution model of banking, in which liquidity demand by short-term investors (banks) can be met with cash reserves (inside liquidity) or sales of assets (outside liquidity) to long-term investors (hedge funds and pension funds). Outside liquidity is a...

The authors consider the case of a manufacturer who sells a homogeneous good to retailers who compe te in prices and "cum-sales" or "post-sales" services. They show that the optimal linear-price contract is inefficient from the point of view of the vertical structure and that simple forms of...

This paper analyzes how organizations can minimize the costs of processing and communicating information. Communication is costly because it takes time for an agent to absorb new information sent by others. Agents can reduce this time by specializing in the processing of particular types of...