Oligopoly

An oligopoly () is a market in which pricing control lies in the hands of a few sellers.

A duopoly (from Greek , ; and , ) is a type of oligopoly where two firms have dominant or exclusive control over a market, and most (if not all) of the competition within that market occurs directly between them.

An oligopsony (from Greek ὀλίγοι (oligoi) "few" and ὀψωνία (opsōnia) "purchase") is a market form in which the number of buyers is small while the number of sellers in theory could be large. This typically happens in a market for inputs where numerous suppliers are competing to sell their product to a small number of (often large and powerful) buyers. It contrasts with an oligopoly, where there are many buyers but few sellers. An oligopsony is a form of imperfect competition.

economic model in which companies compete on the amount of output they will produce, decided independently of each other and at the same time

economic model where firms set prices exceeding their marginal cost and their customers choose quantities at those prices, so that each firm maximise their profits by undercutting competitors' prices

economic model

commercial rivalry between the American Boeing and the European Airbus

supplier of commodity controlling its global deposits and possessing large spare production capacity