392 U.S. 481 (U.S. Supreme Court 1968)
Hanover Shoe is a cornerstone of federal antitrust damages doctrine. Decided in 1968, the case squarely addressed whether an antitrust defendant could avoid or reduce liability by arguing that the direct purchaser "passed on" any unlawful overcharge to its own customers.
In a private antitrust treble-damages action by a direct purchaser, may the defendant assert a "pass-on" defense—that the plaintiff passed on all or part of any illegal overcharge to its own customers—to defeat or reduce damages?
No. Under Clayton Act § 4 (15 U.S.C. § 15(a)), a direct purchaser injured by an antitrust violation may recover threefold damages, measured by the overcharge paid, and an antitrust defendant generally may not assert a pass-on defense to deny or diminish that recovery. A narrow, exceptional circumstance may exist where the direct purchaser has a preexisting, fixed-quantity, cost-plus contract that would automatically and completely transmit the overcharge to its customer, but outside such rare settings, pass-on is not a cognizable defense.
The Supreme Court rejected the pass-on defense and held that Hanover, as a direct purchaser, could recover its full damages without offset for alleged pass-on to its customers. The Court reversed the court of appeals and reinstated the judgment in Hanover's favor.
Hanover Shoe is foundational to antitrust damages jurisprudence. It cements the direct-purchaser rule for federal treble-damages actions and forecloses pass-on defenses in all but exceptional, cost-plus scenarios. The decision prioritizes administrability, deterrence, and predictable enforcement over theoretical precision in tracing price effects through multi-tiered markets. For students, Hanover Shoe is indispensable for understanding how courts balance economic theory with legal policy in shaping remedies. It also directly informs Illinois Brick Co. v. Illinois (1977), which, in harmony with Hanover, generally bars indirect purchasers from recovering federal damages—creating a cohesive federal framework that places primary recovery with direct purchasers. Many states have reacted via "Illinois Brick repealer" statutes, but under federal law, Hanover Shoe remains the bedrock for measuring and allocating antitrust overcharge claims.