The paper studies a federal system where (a) a region provides non-contractible inputs into the social benefits from a public policy project with spillovers to other regions, and (b) where political bargaining between different levels of government may ensure efficient decision making ex post....

The paper studies a federal system where a region provides non-contractible essential inputs for the successful implementation of a local public policy project with spill-overs, and where bargaining between different levels of government may ensure efficient decision making ex post. We ask...