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...

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...

The past forty years have witnessed a remarkable transformation in horizontal merger enforcement in the United States. With no change in the underlying statute, the Clayton Act, the weight given to market concentration by the federal courts and by the federal antitrust agencies has declined...

This comment explains how and why sector-specific enforcement by the Federal Communications Commission (FCC) complements generalist competition enforcement by the Antitrust Division of the Department of Justice (DOJ) and the Federal Trade Commission (FTC), to the benefit of competition in the...

This article takes a fresh look at a longstanding issue in antitrust economics and policy: the problem of oligopoly coordination. First, it explains why coordinated conduct in oligopoly markets is a serious problem and an appropriate concern of antitrust enforcement. It shows that empirical...

Antitrust enforcement against anticompetitive platform most favored nations (MFN) provisions (also termed pricing parity provisions) can help protect competition in online markets. An online platform imposes a platform MFN when it requires that providers using its platform not offer their...

This paper provides evidence of the necessity and success of antitrust enforcement. It begins with examples of socially beneficial antitrust challenges by the federal antitrust agencies to price-fixing and other forms of collusion; to mergers that appear likely to harm competition; and to...

The Trump Administration might follow Donald Trump's populist campaign rhetoric and adopt an approach to antitrust enforcement that emphasizes reining in corporate power. This approach would honor the preferences of the working-class voters who have put Trump into office by vigorously enforcing...

Merger enforcement today relies on settlements more than litigation to resolve anti-competitive concerns. The impact of settlement policy on welfare and the proper goals of settlement policy are highly controversial. Some argue that gun-shy agencies settle for too little while others argue that...

This article summarizes merger enforcement data for the period between 2001 and 2020, using a database created by the authors. The database lists the identity and outcome of every transaction that received a second request during this 20-year period. The database also lists the identity and...