• A primary-line injury, which hinders or seeks to hinder competition among the seller’s competitors, is distinguishable from a secondary-line injury, which refers to discriminatory pricing that hinders or seeks to hinder competition among the seller’s customers, by favoring one customer over another in the prices the seller charges. Cf. SECONDARY-LINE INJURY.
primary line injury
Antitrust. Under the price-discrimination provisions of the Robinson–Patman Act, the practice of charging below-cost, predatory prices in an attempt to eliminate the seller’s competition in the market. 15 USCA § 13(a).