The Supreme Court’s 1911 decision in Standard Oil gave us embryonic versions of two foundational standards of liability under the Sherman Act: the rule of reason under Section 1 and the monopoly power/exclusionary conduct test under Section 2. But a case filed later in 1911, United States v....

Throughout history, vertical merger waves have played a crucial role in shaping industries and market structures. However, opinions on the competitive and welfare effects associated with this phenomenon differ. Some argue that vertical merger waves increase market power and enable the exclusion...

A vertical merger model represents a complex system built on (i) a network of e.g., upstream manufacturers and downstream retailers (ii) who bargain bilaterally in the presence of externalities (iii) created by competition between downstream retailers (iv) facing a consumer demand surface. We...

In this paper we analyze the problem of the enforcement of incomplete contracts with endogenous outside options. Some of the equilibria we outline may reverse one of the main results presented in the standard literature. We then revisit the literature on the highly debated Fisher Body/General...

Within the last three years, Google has acquired YouTube and DoubleClick and has attempted to control part of Yahoo!'s search advertising business. Two of the deals have not raised antitrust concerns by competition authorities. I review these deals with a focus on consumer welfare. Consumers are...

The paper studies the effects of the Pfizer and Pharmacia (2003) merger on competition in the Swiss pharmaceutical market and compares the assessment of the Swiss Competition Commission (COMCO) with the post-merger market developments. We find that the merger has had a miniscule impact on the...

This paper analyzes the welfare implications of buyer mergers, which are mergers between downstream firms from different markets. We focus on the interaction between the merger's effects on downstream efficiency and on buyer power in a setup where one manufacturer with a non-linear cost function...

The paper studies the effects of the Pfizer and Pharmacia (2003) merger on competition in the Swiss pharmaceutical market and compares the assessment of the Swiss Competition Commission (COMCO) with the post-merger market developments. We find that the merger has had a miniscule impact on the...

This article identifies certain problems faced by parties to transnational merger transactions in view of the global proliferation in recent years of competition (and, specifically, merger review) laws. After considering the pros and cons of merger remedies (both structural and behavioral) that...

The "worst opinion" of the title is not the appellate affirmance in United States v. AT&T, which put the final end to the government's challenge to the merger of AT&T and Time Warner. It was the trial court's fundamental ruling at the close of the bench trial, rejecting the government's claims....