This article studies a model of coalition formation for the joint production (and finance) of public projects, in which agents may belong to multiple coalitions. We show that, if projects are divisible, there always exists a stable (secession-proof) structure, i.e., a structure in which no...

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...