The core of a class of non-atomic games which arise in economic applications

We study the core of a non-atomic game v which is uniformly continuous with respect to the DNA-topology and continuous at the grand coalition. Such a game has a unique DNA-continuous extension (v) over bar on the space B-1 of ideal sets. We show that if the extension (v) over bar is concave then the core of the game v is non-empty iff (v) over bar is homogeneous of degree one along the diagonal of B-1. We use this result to obtain representation theorems for the core of a nonatomic game of the form v = f o mu where mu i s a finite dimensional vector of measures and f is a concave function. We a lso apply our results to some nonatomic games which occur in economic appli cations.