a b s t r a c tThis paper deals with the weak-core of normal form games with a continuum set of players and without side payments. This concept is an approximation of the core introduced by Weber, Shapley and Shubik. The weak-core is slightly larger than Aumann's˛-core when adapted to large anonymous games. A nonemptiness result is obtained based on the well known Scarf's non-vacuity theorem for finite games.
In this paper we study the existence of the α−core for an n−person game with incomplete information. We follow a Milgrom-Weber-Balder formulation of a game with incomplete information. The players adopt behavioral strategies represented by Young measures. The game unrolls in one step at the ex ante stage. In this context, the mixed-extensions of the utility functions are not quasi-concave, and as a result the classical Scarf's theorem cannot be applied. An approximation argument is used to overcome this lack of concavity.
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