This paper considers a vertically separated industry with an upstream monopolist who supplies an essential input to two downstream Cournot firms. This situation is relevant to a number of sectors, including the telecommunications industry where trunk operators must have access to the local...

The problem of a monopolist firm that supplies an essential input to other firms that compete in the final downstream market is crucial in many utility industries that use a network. When downstream firms have different degrees of efficiency, then it could be feasible to charge them different...

This book provides an updated overview of the recent progress in the theoretical study of third-degree price discrimination. It is a marketing tactic and is said to be present if the unit price is different across different groups of buyers. Its welfare evaluation is often difficult because it...