Clayton Act

Competition law
Basic concepts
History of competition law Monopoly Coercive monopoly Natural monopoly Barriers to entry Herfindahl–Hirschman Index Market concentration Market power SSNIP test Relevant market Merger control
Anti-competitive practices
Monopolization Collusion Formation of cartels Price fixing Bid rigging Product bundling and tying Refusal to deal Group boycott Essential facilities Exclusive dealing Dividing territories Conscious parallelism Predatory pricing Misuse of patents and copyrights
Enforcement authorities and organizations
International Competition Network List of competition regulators
This box:

The Clayton Antitrust Act of 1914 (Pub.L. 63–212, 38 Stat. 730, enacted October 15, 1914, codified at 15 U.S.C. §§ 12–27, 29 U.S.C. §§ 52–53), was a part of United States antitrust law with the goal of adding further substance to the U.S. antitrust law regime; the Clayton Act sought to prevent anticompetitive practices in their incipiency. That regime started with the Sherman Antitrust Act of 1890, the first Federal law outlawing practices considered harmful to consumers (monopolies, cartels, and trusts). The Clayton Act specified particular prohibited conduct, the three-level enforcement scheme, the exemptions, and the remedial measures.

Like the Sherman Act, much of the substance of the Clayton Act has been developed and animated by the U.S. courts, particularly the Supreme Court.

Since the Sherman Antitrust Act of 1890, courts in the United States had interpreted the law on cartels as applying against trade unions. This had created an impossible situation for workers, who needed to organize so as to rebalance the equal bargaining power against their employers. The Sherman Act had also triggered the largest wave of mergers in US history, as businesses realized that instead of creating a cartel they could simply fuse into a single corporation, and have all the benefits of market power that a cartel could bring. At the end of the Taft administration, and the start of the Woodrow Wilson administration, a Commission on Industrial Relations was established. During its proceedings, and in anticipation of its first report on the 23 October 1914, legislation was introduced by Alabama Democrat Henry De Lamar Clayton Jr. in the U.S. House of Representatives. The Clayton Act passed by a vote of 277 to 54 on June 5, 1914. Though the Senate passed its own version on September 2, 1914, by a vote of 46–16, the final version of the law (written after deliberation between Senate and the House), did not pass the Senate until October 5 and the House until October 8 of the next year.

...
Wikipedia