The importance of merger retrospectives as a way to assess competition policy is well-recognized. Yet there have been few retrospectives – none that we are aware of for any recent merger – that examine the accuracy of the predictions made by economic models used in the antitrust...

On March 20, 2011, wireless provider AT&T announced its intention to merge with T-Mobile USA, a competing wireless provider. This article reviews the economic analysis of this proposed acquisition that we carried out for Sprint and explains why the merger would have been anticompetitive. We...