For sufficiently low abatement costs many countries might undertake significant emission reductions even without any international agreement on emission reductions. We consider a situation where a coalition of countries does not cooperate on emission reductions but cooperates on the development...

We develop a model in which it is uncertainty about the future domestic policy environment that both makes international cooperation attractive and induces the possibility of a nation reneging on such an international agreement. We show, in a fairly general setting in which the likelihood of...