Strategic Economics

Antitrust and the Consumer-welfare Standard

Understand the single rule that has decided almost every competition case for forty years (that harming a competitor is legal and harming competition is not), plus the four things that rule cannot see, which is why it is now the most argued-about idea in the field.

  • Advanced
  • 15 min total
  • 14 chapters

What decision this helps you make: Which of your commercial practices sit in territory where intent and market power are irrelevant because the conduct is condemned outright, and which sit in territory where the whole question is whether customers end up better or worse off.

What this topic is

Antitrust law forbids three broad things: agreements among competitors that suppress competition, conduct by a dominant firm that maintains its position by means other than merit, and mergers whose effect may be substantially to lessen competition. The consumer-welfare standard is the rule courts use to sort the prohibited from the permitted. Conduct is condemned when it makes customers worse off (higher prices, lower output, worse quality, less innovation), and not merely because it damages a competitor. Competition is supposed to damage competitors; that is what it is.

Why it matters

Almost every strategic move worth making hurts somebody. Cutting price hurts rivals. Signing an exclusive hurts the supplier your rival wanted. Buying a smaller competitor removes an option customers had. The standard is the line between all of that and the conduct that gets a company sued, fined, or in the case of a naked cartel, prosecuted criminally. Knowing where the line sits is not a legal department problem: the conduct that crosses it is usually initiated by someone in commercial who did not know there was a line.

Who should learn it

Executives who negotiate exclusives, set resale terms, or share benchmarking data with competitors; anyone whose company is big enough that its ordinary conduct might be judged differently; corporate-development teams; and readers who want to understand the substance of the argument now being had about whether this framework still works.

What you will understand

  • The difference between per se rules and the rule of reason, and why market power is irrelevant to one of them
  • The burden-shifting structure a rule-of-reason case actually follows, step by step
  • What the standard is genuinely good at, and the four categories of harm it struggles to see
  • The current argument on both sides, stated strongly enough to be worth having

Prerequisites

Common misconception

That antitrust is a large-company problem. Two of the most dangerous rules apply regardless of size. An agreement among competitors to fix prices, rig bids, allocate customers or territories, or not to hire each other's staff is condemned outright: no market power is required, no efficiency justification is heard, and in the United States the first three can be prosecuted as felonies. A firm with 2% share and a handshake at a trade association is in more legal danger than a firm with 60% share pricing aggressively on the merits. The size-based intuition is exactly backwards for the conduct most likely to occur inside an ordinary business.