We consider a monopolistic supplier’s optimal choice of wholesale tariffs when downstream firms are privately informed about their retail costs. Under discriminatory pricing, downstream firms that differ in their ex ante distribution of retail costs are offered different tariffs. Under uniform...

We study welfare effects of horizontal mergers under a successive oligopoly model and find that downstream mergers can increase welfare if they reduce input prices. The lower input price shifts some input production from cost- inefficient upstream firms to cost-efficient ones. Also, the lower...

We study final product manufacturers’ incentives to introduce new products into the market and how they are affected by a merger among them. We show that when manufacturers distribute their products through multi-product retailers, a manufacturers merger, although it leads to an increase in...

We consider a model in which firms use resale price maintenance (RPM) to dampen competition. We find that even though the motive for using RPM is thus anticompetitive, market forces may limit the overall adverse impact on consumers. Indeed, we find that when there are a large number of firms in...

Legal actions by direct and indirect purchasers to recover damages as a result of price-fixing by suppliers have been common in the United States for many years and are now beginning in a number of other countries including Australia and Canada. This paper argues that traditional measures of...

This paper examines the output effect of third-degree price discrimination in symmetrically differentiated oligopoly. We find that when the sellers' input costs are chosen endogenously by an upstream supplier with market power, as opposed to being fixed exogenously, long-standing qualitative...

This paper examines the use of market-share thresholds (safe harbors) in evaluating whether a given vertical practice should be challenged. Such thresholds are typically found in vertical restraints guidelines (e.g., the 2000 Guidelines for the European Commission and the 1985 Guidelines for the...

We analyze the effects of accidents and liability obligations on the incentives of car manufacturers to monopolize the markets for their spare parts. We show that monopolized markets for spare parts lead to higher overall expenditures for consumers. Furthermore, while the manufacturers invest...

In digital markets, big technology firms like Google, Microsoft, Amazon, etc., compete with each other across multiple markets. Some markets are platforms/two-sided with products offered for free to users, whereas other markets are one-sided with paid products. In some cases, market competition...

This paper studies the welfare consequences of a vertical merger that raises rivals costs when downstream competition is à la Cournot between firms with constant asymmetric marginal costs. The main result is that such a vertical merger can nevertheless improve welfare if it involves a...