legislation that forbids quoting different prices to competing customers unless such price discrimination is justified by differences in costs of manufacturing, sales, or delivery.

1914 federal consumer protection legislation that prohibits certain monopolistic practices and other impediments to free market competition, including price discrimination, mergers that may lessen competition, tying agreements and exclusive dealings. The Clayton Act also holds corporate officials personally liable for damages resulting from activities in violation of the Act's rulings. The Clayton Act was designed to be more effective in preventing threats or potential threats to competition than the 1890 Sherman Antitrust Act. The Sherman Act does not come into play until after a violation is committed and has impeded competition. The Clayton Act is enforced by the Federal Trade Commission in conjunction with the Department of Justice.