The aim of this paper is to examine the non-cooperative basis of the core. We provide mechanisms that are motivated closely by the very description of the core, and have the property that their non-cooperative equilibrium outcomes coincide with the core. For general economic environments we...

We study a market with pair wise meetings of agents and with a one sided information asymmetry regarding the state of the world, which may be "low" or "high." We characterize the set of equilibria of the model, and study its behavior as the market becomes approximately friction less. For any one...

We study the welfare properties of a market with pairwise meetings and asymmetric information, establishing an equivalence between asymptotically expost individually rational and asymptotically (ex-ante, interim and ex-post) efficient equilibrium sequences. <!--ID="" Correspondence to:O. Yosha-->

In this paper we provide two simple new versions of Arrow’s impossibility theorem, in a model with only one preference profile. Both versions are transparent, requiring minimal mathematical sophistication. The first version assumes there are only two people in society, whose preferences are...