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Duopoly is the most commonly studied form of oligopoly due to its simplicity. Duopolies sell to consumers in a competitive market where the choice of an individual consumer choice cannot affect the firm in a duopoly market, as the defining characteristic of duopolies is that decisions made by each seller are dependent on what the other ...
Cournot's model of competition is typically presented for the case of a duopoly market structure; the following example provides a straightforward analysis of the Cournot model for the case of Duopoly. Therefore, suppose we have a market consisting of only two firms which we will call firm 1 and firm 2.
The distinguishing characteristic of a duopoly is a market featuring solely two firms. Competition in a duopoly can vary due to what is being set in the market: price or quantity (see Cournot competition and Bertrand competition). It is generally agreed that a duopoly will feature higher barriers to entry than an oligopoly, as firms within a ...
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Stackelberg's duopoly. In this model, the firms move sequentially to determine their quantities (see Stackelberg competition). Cournot's duopoly. In this model, the firms simultaneously choose quantities (see Cournot competition). Bertrand's oligopoly. In this model, the firms simultaneously choose prices (see Bertrand competition).
The Bertrand model of price competition in a duopoly market producing homogenous goods has the following characteristics: Players: Two firms =, with constant marginal cost , (=); Strategic Variables: Firm's select the price level (i.e., =);
Anti-competitive practices are commonly only deemed illegal when the practice results in a substantial dampening in competition, hence why for a firm to be punished for any form of anti-competitive behavior they generally need to be a monopoly or a dominant firm in a duopoly or oligopoly who has significant influence over the market.
Characteristics of "imperfect" market structures Market Structure Number of buyers and sellers Degree of product differentiation Degree of control over price Monopolistic Competition: Many buyers and sellers: Some: Some Oligopoly: Few sellers and many buyers: Some: Some Duopoly: Two sellers and many buyers: Complete: Complete Monopoly: One ...