The ex ante incentive compatible core of an exchange economy with private information is the (standard) core of a … incentive compatible core can be empty, even if utility functions are quasi-linear. If, in addition to quasi-linearity, further … assumptions are made (like independent private values), the non-emptiness of the core follows nevertheless from d'Aspremont and …

members of a coalition. We then define a concept of the Core that takes into account these communication possibilities. The … internal consistency of the improvements is considered and an Internally Consistent Core is introduced, that requires …