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Vertical Mergers In A Model Of Upstream Monopoly And Incomplete Information, Serge Moresi, David Reitman, Steven C. Salop, Yianis Sarafidis
Vertical Mergers In A Model Of Upstream Monopoly And Incomplete Information, Serge Moresi, David Reitman, Steven C. Salop, Yianis Sarafidis
Georgetown Law Faculty Publications and Other Works
We examine the role of private information on the impact of vertical mergers. A vertical merger can improve the information that is available to an upstream monopolist because, after the merger, the monopolist can observe the cost of its downstream merger partner. In the pre-merger world, because the costs of the downstream firms are private information, the monopolist has incomplete information and cannot implement the monopoly outcome: The expected pre-merger equilibrium price of the downstream product is lower than the monopoly price. After a vertical merger, the equilibrium input price that is charged to the downstream rival can either increase …
Quantifying The Increase In “Effective Concentration” From Verticle Mergers That Raise Input Foreclosure Concerns: Comment On The Draft Vertical Merger Guidelines, Serge Moresi, Steven C. Salop
Quantifying The Increase In “Effective Concentration” From Verticle Mergers That Raise Input Foreclosure Concerns: Comment On The Draft Vertical Merger Guidelines, Serge Moresi, Steven C. Salop
Georgetown Law Faculty Publications and Other Works
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 vertical merger raises input foreclosure concerns. We also show that it then is possible to calculate an effective increase in the HHI measure of concentration for the downstream market. We refer to this “proxy” measure as the “dHHI.” We derive the dHHI measure by comparing the pricing incentives and associated upward …