Oligopolistic competition

Oligopolistic competition can give rise to a wide range of different outcomes.

Such models consequently may be inadequate for analyzing trade in such key sectors as aircraft, telecommunications equipment, semiconductors, and pharmaceuticals --where oligopolistic competition and substantial economies of scale frequently occur ...

Another property distinguishes monopolistic competition from the oligopolistic competition with free entry, that is, in monopolistic competition a price change by one firm has only a negligible effect on the demand of any other firm.

The use of government policies to alter the outcome of international oligopolistic competition so as to increase the profits of domestic firms at the expense of foreign firms. This is a key element of strategic trade policy.
Prohibited subsidy ...

See also: Perfect competition, Barriers, Differentiation, Monopoly, Price competition