These recommendations and comments respond to the request by the Federal Trade Commission and the Department of Justice’s Antitrust Division for public comment on the draft 2020 Vertical Merger Guidelines. We commend the agencies for updating the 1984 non-horizontal merger guidelines by...

There seems to be consensus that the Department of Justice's 1984 Vertical Merger Guidelines do not reflect either modern theoretical and empirical economic analysis or current agency enforcement policy. Yet widely divergent views of preferred enforcement policies have been expressed among...

Economists widely agree that, absent sufficient efficiencies or other offsetting factors, mergers that increase concentration substantially are likely to be anticompetitive. Further, holding everything else equal, the magnitude of anticompetitive effects tends to be larger, the larger is the...

The FCC’s analysis of the Comcast-NBCU transaction fills a gap in the contemporary treatment of vertical mergers by providing a roadmap for courts and litigants addressing the possibility of anticompetitive exclusion. The FCC identified the factors any judicial or administrative tribunal would...

This handbook chapter appears in Antitrust Law & Economics (Keith Hylton, ed. 2010). It describes the role of market concentration in the legal framework for the antitrust review of horizontal mergers and evaluates the extent to which modern economic analysis supports a role for concentration in...

The antitrust rules governing exclusionary conduct by dominant firms are among the most controversial in U.S. competition policy. During the first decade of the twenty-first century, they were debated in three arenas, involving legal policy, economic policy, and politics. In each arena, the...

This chapter has been prepared for inclusion in the RESEARCH HANDBOOK ON THE ECONOMICS OF ANTITRUST LAW (Einer Elhauge, ed.). It first explains why unilateral effects may result from horizontal mergers, and then describes several key models that have been developed to gauge the likelihood and/or...

This comment on a forthcoming article by Keith Hylton and David Evans explains why considerations of "dynamic competition" do not argue against antitrust enforcement. While the prospect of achieving monopoly may foster innovation, that observation misleads as to appropriate antitrust policy...

The US competition agencies – the Antitrust Division of the Department of Justice (DOJ) and the Federal Trade Commission (FTC) – often share jurisdiction with sectoral regulators also charged with fostering competition, such as the Federal Communications Commission (FCC). This article...