Models of imperfect competition contain the possibility of multiple equilibria when the markup of price over marginal cost is negatively dependent on activity. The model most often used in applied work, the Dixit and Stiglitz (1977) model, is usually thought not to be able to produce such an...

We introduce a flexible third-degree price discrimination framework by modeling the information firms possess about consumers' locations (preferences) on the Salop circle as a partition. Higher information quality is translated into a partition refinement. In the limit, we obtain the perfect...

The paper addresses the question of pricing access to the network facilities of an incumbent firm after deregulation. Network access pricing continues to be regulated in such industries as telecommunications, railroads, electric power and natural gas. We emphasize that access prices should be...