We introduce a model of oligopolistic price setting where products are characterized by style and quality. Producers are identified by a unique style, and are able to price discriminate among consumers using quality. We show that, in contrast to Mussa and Rosen's work on the discriminating...

In this paper we consider a model of group formation where group of individuals may have different feasible sets. We focus on two polar cases, increasing returns, when the set of feasible alternatives increases if a new member joins thegroup, and decreasing returns, when a new member has an...