price discrimination. The practice of offering identical or similar goods to different buyers at different prices when the costs of producing the goods are the same. • Price discrimination can violate antitrust laws if it reduces competition. It may be either direct, as when a seller charges different prices to different buyers, or indirect, as when a seller offers special concessions (such as favorable credit terms) to some but not all buyers. [Cases: Monopolies 17(2.9). C.J.S. Monopolies § 96.]

persistent price discrimination. A monopolist’s systematic policy of obtaining different rates of return from different sales groupings.

[Blacks Law 8th]