Marialaura Pesce

University of Naples

Abstract: We study a notion of bargaining set for mixed markets, which are exchange economies in which the presence of large traders (such as oligopolies or cartels) violates the paradigm of perfect competition. Our analysis focuses on some properties of Mas-Colell's bargaining set that hold in competitive economies and typically fail when large traders are considered. We show that, under mild assumptions, one can restore many of these properties by modifying the definition of bargaining set and allowing only objections that do not discriminate between agents of the same type.