This paper is concerned with the role of a supra-national agency, such as the European Commission, say in influencing environmental policies set by national governments. One rationale for such intervention is the need to overcome incentives for national governments to engage in "environmental...

We consider environmental policy in a federal system where states face purely domestic environmental problems. It is normally argued that in this context, environmental policy is best set at the state level, perhaps because of better local information. To provide a rationale for federal...