We discuss competition among payment card networks, and in particular how antitrust practitioners might approach questions or market definition and market power in these markets. Application of the hypothetical monopolist test to define markets, and the use of traditional metrics to measure...

<Para ID="Par1">During 2013–2014, the Antitrust Division of the U.S. Department of Justice brought a wide range of matters to successful conclusions. The three matters that are discussed below demonstrate the diverse set of issues that the division examines every year. Copyright Springer Science+Business...</para>

This paper covers the activities of the Economic Analysis Group (EAG) of the Antitrust Division, U.S. Department of Justice, during 2005–2006. It describes the economic analysis undertaken by EAG in several important investigations, appellate matters, and other activities as an advocate for...

This paper covers the activities of the Economic Analysis Group (EAG), during 2003–2004. It describes the economic analysis undertaken by EAG in several important investigations, litigations, and administrative and appellate matters. Copyright Kluwer Academic Publishers 2004

While it can be hard to evaluate a failing firm defense under the Merger Guidelines, the principles underlying the test are generally sound, even when the overall economy is going through very difficult times.

The author argues for using the total welfare standard, rather than the more commonly employed consumer welfare standard. In doing so, Heyer responds to three broad objections that have been raised.