The paper studies when efficient allocations are implementable via coalition-proof mechanisms. When ambiguous … implementable via interim coalition incentive compatible mechanisms if and only if the prior distribution of agents’ types satisfies … the Coalition Beliefs Determine Preferences (CBDP) property. When the CBDP property holds, these mechanisms can be …

non-coalition countries with regard to emissions and welfare and compare business as usual with the coalition … liberalization by moving from autarky to free trade. Although the coalition steps up its mitigation effort, world emissions rise … environment as well as for the coalition countries’ welfare and the aggregate welfare of all countries; it reduces the range of …

. In particular, it is equivalent to the set of perfectly coalition-proof Nash equilibria (Bernheim, Peleg, and Whinston …