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 …

We examine the welfare properties, coalition-proofness and order-theoretical structure of the set of Nash equilibria in … games, we prove the equivalence among the set of Nash equilibria, the set of coalition-proof Nash equilibria under strong … prove that the fixed points of some "extremal" selections from the joint best reply correspondence are both coalition …