We model an international union as a group of countries deciding together on the provision of public goods or policies that generate spillovers across members. The trade-off between benefits of coordination and loss of independent policymaking endogenously determines size, composition and scope...

We study the organization of federations — or international unions — which decide together the provision of certain public goods. The benefit of centralization depends on the internalization of the spillovers, that of decentralization on the adaptability to local differences. We individuate...

We model an international union as a group of countries deciding together the provision of certain public goods and policies because of spillovers. The countries are heterogeneous either in preferences and/or in economic fundamentals. The trade off between the benefits of coordination and the...