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However, some Cournot strategy profiles are sustained as Nash equilibria but can be eliminated as incredible threats (as described above) by applying the solution concept of subgame perfection. Indeed, it is the very thing that makes a Cournot strategy profile a Nash equilibrium in a Stackelberg game that prevents it from being subgame perfect.
An oligopoly (from Ancient Greek ὀλίγος (olígos) 'few' and πωλέω (pōléō) 'to sell') is a market in which pricing control lies in the hands of a few sellers. [ 1 ] [ 2 ] As a result of their significant market power, firms in oligopolistic markets can influence prices through manipulating the supply function .
Cournot's discussion of oligopoly draws on two theoretical advances made in earlier pages of his book. Both have passed (with some adjustment) into microeconomic theory, particularly within subfield of Industrial Organization where Cournot's assumptions can be relaxed to study various Market Structures and Industries, for example, the ...
Nash proved that if mixed strategies (where a player chooses probabilities of using various pure strategies) are allowed, then every game with a finite number of players in which each player can choose from finitely many pure strategies has at least one Nash equilibrium, which might be a pure strategy for each player or might be a probability ...
Example: Network providers [6] ( Entry barriers, Small number of sellers, many buyers, products can be homogeneous or differentiated). Three types of oligopoly. Three types of oligopoly. Due to the hallmark of oligopoly being the presence of strategic interactions among rival firms, the optimal business strategy of an enterprise can be studied ...
When comparing the models, the oligopoly theory suggest that the Bertrand industries are more competitive than Cournot industries. This is because quantities in the Cournot model are considered as strategic substitutes; that is, the increase in quantity level produced by a firm is accommodated by the rival, producing less.
In microeconomics, the Bertrand–Edgeworth model of price-setting oligopoly looks at what happens when there is a homogeneous product (i.e. consumers want to buy from the cheapest seller) where there is a limit to the output of firms which are willing and able to sell at a particular price. This differs from the Bertrand competition model ...
Examples of close-to-perfect markets typically include share and foreign exchange markets while the real estate market is typically an example of a very imperfect market. In such markets, the theory of the second best proves that, even if one optimality condition in an economic model cannot be satisfied, the next-best solution can be achieved ...