Stop Making Sense: Reviving the Robinson-Patman Act and the Economics of Intermediate Price Discrimination
We examine the modern theoretical and economic literature analyzing intermediate good price discrimination, and its bearing on recent attempts to revive enforcement of the Robinson-Patman Act. While economists have replaced economically incoherent arguments with internally consistent theoretical models that show that it is possible for intermediate good price discrimination to decrease welfare, the literature has been much less successful in providing theoretical guidance or empirical evidence on whether and when these possibility theorems apply to potential real-world cases outside of the academic blackboard. When models instead incorporate key institutional features of pricing that large firms actually use, such as non-linear pricing and bargaining, economic analyses find that restricting intermediate good price discrimination increases input prices and reduces welfare.
The lack of useful guidance from models and empirical evidence suggesting potential harm is particularly relevant when one considers the history and content of Robinson-Patman. Like the economic literature, neither the statute nor its history at the Federal Trade Commission (FTC) provides useful guidance for enforcing the statute consistent with modern antitrust principles. The statute's protectionist origins (although not necessarily it's actual language) and the FTC’s misguided application show instead that enforcement had little purpose other than to try to constrain innovation in manufacturing and retailing by large, efficient firms. The companion piece to this paper, Zombie Antitrust: Is Robinson Patman a Dead Law Walking? details the Act’s history, including the reasons for disuse after decades of aggressive FTC enforcement and the recent efforts at revival. While cases “targeted” towards harmful discriminatory input pricing sound useful in theory, such a strategy appears impractical. Moreover, for any harms from discriminatory prices identified by the modern economic literature, the antitrust law already can apply a nuanced policy that considers both the benefits and costs of challenged practices under existing Sherman and Clayton Act precedent. Thus, there is little marginal benefit from reviving the Act, a statute ill-suited to such a task.