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ANTITRUST LAWS: A series of laws passed by the U. S. government that tries to maintain competition and prevent businesses from getting a monopoly or otherwise obtaining and exerting market control. The first of these, the Sherman Antitrust Act, was passed in 1890. Two others, the Clayton Act and the Federal Trade Commission Act, were enacted in 1914. These laws impose all sorts of restrictions on business ownership, control, mergers, pricing, and how businesses go about competing (or cooperating) with each other.

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OLIGOPOLY: A market structure dominated by a small number of large firms, selling either identical or differentiated products, and significant barriers to entry into the industry. This is one of four basic market structures. The other three are perfect competition, monopoly, and monopolistic competition.

     See also | market structure | firm | industry | oligopoly characteristics | oligopolistic behavior | market control | product differentiation | barrier to entry | concentration ratio | merger | nonprice competition | collusion | cartel | monopoly | monopolistic competition | oligopsony | antitrust laws | technology | economic growth |


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OLIGOPOLY, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2026. [Accessed: March 16, 2026].


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MARGINAL FACTOR COST, PERFECT COMPETITION

The change in total factor cost resulting from a change in the quantity of factor input employed by a perfectly competitive firm. Marginal factor cost, abbreviated MFC, indicates how total factor cost changes with the employment of one more input. It is found by dividing the change in total factor cost by the change in the quantity of input used. Marginal factor cost is compared with marginal revenue product to identify the profit-maximizing quantity of input to hire.

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