This article explains the inherent loss of an indirect competitor and reduction in competition when a vertical merger raises input foreclosure concerns. We then calculate a measure of the effective increase in the HHI measure of concentration for the downstream market, and we refer to this...

This comment responds to the request by the Federal Trade Commission and the Department of Justice’s Antitrust Division for public comment on the draft 2020 Vertical Merger Guidelines. In this comment, we show that there is an inherent loss of an indirect competitor and competition when a...

The DOJ/ FTC Vertical Merger Guidelines (VMGs) were adopted by the FTC in June 2020 by a party-line 3-2 party line over the dissent of the Acting Chair. One might expect that the VMGs will be withdrawn and/or revised, now that there is a Democratic majority. Revision is appropriate because the...

This short note prepared for an OECD meeting in June 2021 examines several antitrust issues involving analysis of potential competition. While the analysis is not new, it is still useful to collect them together in a unified fashion to show how they are related. In this regard, all the analysis...