Private person may sue and recover treble damages. Regulates contracts that unreasonably restrain trade. Rule of reason - contracts illegal if anticompetitive effects unreasonably outweigh competitive effects. Per se unreasonable - certain types of contracts deemed unreasonably anticompetitive automatically with no weighing necessary. Horizontal restraints of trade - competitors agree.
Price fixing - sellers agree to establish minimum or maximum prices.
Market sharing - competitors agree to serve only a part of a market. Group boycott - competitors agree to boycott certain buyers or sellers. Vertical restraints of trade - agreement at different levels of distribution. Resale price maintenance agreements - vertical price fixing. Tying arrangements - seller limits the sale of the tying product unless buyer also buys the tied product.