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AS: The abbreviaion for aggregate supply, which is the total (or aggregate) real production of final goods and services available in the domestic economy at a range of price levels, during a given time period. Aggregate supply (AS) is one half of the aggregate market analysis; the other half is aggregate demand. Aggregate supply, relates the economy's price level, measured by the GDP price deflator, and aggregate domestic production, measured by real gross domestic product. The aggregate supply relation is generally separated into long-run aggregate supply, in which all prices and wages and flexible and all markets are in equilibrium, and short-run aggregate supply, in which some prices and wage are NOT flexible and some markets are NOT in equilibrium.

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DUOPOLY:

An oligopoly market structure containing exactly two firms. As an oligopoly, duopoly exhibits the oligopolistic characteristics and undertakes oligopolistic behavior, such as barriers to entry, interdependent actions, and nonprice competition. While duopoly, in its purest form of EXACTLY two firms in the industry, is seldom found in the real world, it does provide an excellent, easy to use illustration of oligopoly. In fact, most instructional analysis of oligopoly generally assumes a two-firm, duopoly market.
Duopoly is a special type of oligopoly market structure that contains only two firms, no more, no less. Duopoly is an ideal model for analyzing oligopoly behavior. With more than one firm, duopoly captures the essence of oligopoly, especially interdependent behavior, while keeping the analysis as simple as possible.

The duopoly model is commonly used to analyze collusion, which results when two firms join together to control the market like a monopoly. Duopoly is ideally suited for collusion analysis. It contains the minimum number of firms needed for an oligopoly and provides all of the insight that would be generated from analyzing three or more firms.

Another model using the duopoly market structure is game theory, which investigates the interdependent actions of two competing firms. Game theory is conceptually and analytically more difficult if more than two firms are included. The essential conclusion can be easily obtained using duopoly.

While the real world seldom contains a pure duopoly market structure, some industries come close. In particular, the duopoly model works well if a market is dominated by two large firms, even though it might contain other smaller ones.

One example that comes close to duopoly is the global market for passenger aircraft. This market is dominated by Boeing (from the United States) and Airbus (from Europe). The vast majority of all passenger airlines use planes manufactured by one of these two firms. Another example might be offered by a small town that contains two grocery stores.

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DUOPOLY, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2021. [Accessed: September 23, 2021].


Check Out These Related Terms...

     | oligopoly, characteristics | oligopoly, behavior | oligopoly, realism | oligopoly, concentration |


Or For A Little Background...

     | oligopoly | market structures | market control | imperfect competition |


And For Further Study...

     | collusion | collusion production analysis | game theory | kinked-demand curve | kinked-demand curve analysis | cartel | concentration ratios | merger | monopoly | barriers to entry | product differentiation |


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