Vertical Antitrust Policy as a Problem of Inference
James C. Cooper
George Mason University School of Law - Law & Economics Center
Vanderbilt University - Strategy and Business Economics
Daniel P. O'Brien
Federal Trade Commission - Bureau of Economics
U.S. Federal Trade Commission - Bureau of Economics
April 5, 2005
Vanderbilt Law and Economics Research Paper No. 05-12
The legality of nonprice vertical practices in the U.S. is determined by their likely competitive effects. An optimal enforcement rule combines evidence with theory to update prior beliefs, and specifies a decision that minimizes the expected loss. Because the welfare effects of vertical practices are theoretically ambiguous, optimal decisions depend heavily on prior beliefs, which should be guided by empirical evidence. Empirically, vertical restraints appear to reduce price and/or increase output. Thus, absent a good natural experiment to evaluate a particular restraint's effect, an optimal policy places a heavy burden on plaintiffs to show that a restraint is anticompetitive.
Number of Pages in PDF File: 39
Date posted: April 6, 2005
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