over consumption goods, competitive equilibrium allocations exist and belong to the (ex ante incentive) core. Furthermore …, any competitive equilibrium allocation can be viewed as an element of the core of the n-fold replicated economy, for every …

We identify particular exchange economies with asymmetric information in which the ex ante incentive compatible core is … nonempty provided that coalitions can allocate goods by means of random mechanisms. Both the use of random mechanisms and the … restriction to a specific class of economies are crucial for the result. Indeed, the ex ante incentive compatible core can be …

We prove the non-emptiness of the core of an NTU game satisfying a condition of payoff-dependent balancedness, based on … transfer rate mappings. We also define a new equilibrium condition on transfer rates and we prove the existence of core payoff … vectors satisfying this condition. The additional requirement of transfer rate equilibrium refines the core concept and allows …

incomplete information. We discuss exchange economies, cooperative Bayesian games with orthogonal coalitions, and issues of …

incentive compatibility constraints : the associated ex ante core is generically nonempty. However, we exhibit a well …–behaved exchange economy in which this core is empty, even if goods are allocated through random mechanisms. …

In a commonvalueauction in which the information partitions of the bidders are connected, all rings are core … form, in spite of the underlying strategic externalities. A ring is core-stable if the core of this characteristic function … core-stable. …

with independent private values. The ex ante expected utilities of coalitions, at an incentive compatible (noncooperative …) coalitional equilibrium, describe a (cooperative) partition form game. A coalition is core-stable if the core of a suitable …