In 2004, the European Commission held that Microsoft had abused its dominant position under Article 82 of the European Treaty by, among other actions, refusing Sun Microsystems' request for information Sun needed to interoperate with Windows workgroup server products. The EC ordered Microsoft to...

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...

Frank Easterbrook's 1984 article, The Limits of Antitrust, did not focus on public antitrust enforcement. Nevertheless, it expressed the kind of antitrust thinking that led the Antitrust Division of the U.S. Department of Justice, around the same time, to shift its resources to cartel...

After the Supreme Court's 2007 decision in Bell Atlantic Corp. v. Twombly, an antitrust plaintiff who tries to plead an agreement in restraint of trade under Section 1 of the Sherman Act must allege more than parallel conduct and an undefined “conspiracy.” Now, the complaint must include...

The Department of Justice's Section 2 Report considered in great detail how courts should best go about identifying exclusionary conduct and how they should best remedy that kind of conduct once they found it. Even though the new Assistant Attorney General has now withdrawn the Report as an...

In this article, first published in 17 Managerial & Decision Econ. 127 (1996), we show how economic theory guides the courts' determinations of which harms from collusive and exclusionary practices constitute antitrust injury