Should a subset of member states of a federation be allowed to form a sub-union on some policy issue? When centralization is not politically feasible, allowing an enhanced cooperation agreement among a subset of countries permits the latter to gain benefits which would otherwise be lost....

In this paper we propose a simple model of bailing out that closely describes the intergovernmental relationships between the Central government and the regional governments in the Italian public health care sector. The theoretical model suggests that bail out expectations by regions can be...