CHAPTER 46: ANTITRUST LAW 21
IV. The Clayton Act
The Clayton Act targets specific practices that substantially reduce competition or could lead to monopoly
power but are not clearly prohibited by the Sherman Act. The U.S. Department of Justice and the Federal
Trade Commission (FTC) enforce the act. Private parties may also sue for treble damages and attorneys’
fees.
A. SECTION 2—PRICE DISCRIMINATION
Price discrimination occurs when a seller charges different prices to competitive buyers.
1. Required Elements
• The seller must be engaged in interstate commerce.
• The goods must be of like grade or quality.
• The goods must have been sold to two or more buyers.
• The effect of the price discrimination must be to substantially lessen competition or create a
competitive injury.
2. Defenses
• Cost justification—a buyer’s purchases saved a seller costs in producing and selling goods.
• Meeting a competitor’s prices—when a lower price is charged temporarily and in good faith to
meet another seller’s equally low price to the buyer’s competitor.
• Changing market conditions—changing conditions affected the market for or marketability of
the goods.
B. SECTION 3—EXCLUSIONARY PRACTICES
Sellers or lessors cannot sell or lease on condition that the buyer or lessee not use or deal in goods of
the seller or lessor’s competitor.
1. Exclusive-Dealing Contracts
An exclusive-dealing contract, like other anticompetitive agreements, is prohibited if it substantially
lessens competition or tends to create a monopoly.
2. Tying Arrangements
The legality of a tying arrangement depends on many factors, particularly the business purpose or
effect of the arrangement. A tying arrangement that ivolves services must be attacked under
Section 1 of the Sherman Act (because the Clayton Act has been held to cover only commodities).
Once held illegal per se, such arrangements are now more likely to be subject to a rule-of-reason
analysis.
C. SECTION 7—MERGERS
• A person or business organization cannot hold stock or assets in another business if the effect may
be to substantially lessen competition.
• A crucial consideration in merger cases is the market concentration of a product or business—its
percentage market share among competitors in the relevant market. When a small number of
companies control a large share of the market, the market is concentrated.