Antitrust analysis of online markets is a hot topic around the world. In a number of jurisdictions, online markets already have been subject to antitrust review in merger or conduct cases. In other jurisdictions, these issues are in a nascent stage of policy. A number of lessons can be learned...

Antitrust remedies -- criminal and civil, public and private, penalties and injunctions -- are supposed to “eliminate the effects of the illegal conduct” and “restore competition.” In pursuing these goals, courts and enforcers are guided by the standard of economic efficiency and by...

This article, published in 1991, describes the two great ideologies of the market and the state that shaped antitrust law at its inception. In the evolutionary vision, market outcomes are spontaneous and unintended results of countless interactions of self-interested individuals; the resulting...

Antitrust and competition law have grown dramatically in importance and significance over the last fifty years. US antitrust law has been the principal source of inspiration for jurisdictions wishing to introduce regulation to control cartels and monopolization, and antitrust regulation has now...

For competing firms, a patent settlement provides a rare opportunity to write an agreement that forestalls competition without transparently violating the antitrust laws. Problematically, such agreements are highly profitable for reasons that have nothing to do with resolving a patent dispute....

U.S. antitrust law empowers enforcers to review pending mergers that might undermine competition. But there is growing evidence that the merger-review regime is failing to perform its core procompetitive function. Industry concentration and the power of dominant firms are increasing across key...

A fallacy lies at the core of modern antitrust. The ascendance of the consumer welfare standard is a story often told. Yet existing narratives overlook the pivotal role that output has played--and continues to play--in shaping the contemporary antitrust enterprise. That role has gone unnoticed...