In this paper, we tackle the dilemma of pruning versus proliferation in a vertically differentiated oligopoly under the assumption that some firms collude and control both the range of variants for sale and their corresponding prices, likewise a multiproduct firm. We analyse whether pruning...

In this paper, we tackle the dilemma of pruning versus proliferation in a vertically differentiated oligopoly under the assumption that some firms collude and control both the range of variants for sale and their corresponding prices, likewise a multiproduct firm. We analyse whether pruning...

Recent years have witnessed an increased interest, by competition agencies, in assessing the competitive effects of partial acquisitions. We propose an empirical structural methodology, which can deal with settings involving all types of owners and ownership rights, to quantify the coordinated...

The paper addresses the issue of coordinated effects of mergers in the framework of a differentiated products model. Firms' assets are product varieties that can be sold individually or entirely transferred to another firm in a merger. We show that under symmetric optimal punishment schemes the...

The most pressing debates in antitrust today center on major platforms like Amazon, Google, and Facebook. Platform markets are subject to strong network effects, which tend to create barriers to entry and reinforce market power. Frequently, the only way for a new platform to enter the market...

I consider bundling of two products as a strategy to avoid entry in a differentiated product market. I construct a simple model in which the potential entrant can offer a differentiated product to one of the incumbent's products. I show that the incumbent optimally bundles irrespective of entry....