An Oligopoly is a market structure in which few large firms dominate the market. When a market is shared between a few firms, it is said to be highly concentrated. Although only a few large firms dominate, it is possible that many smaller firms also operate in the market. Oligopolists may have considerable power to fix prices and output. Oligopolies can result from various forms of collusion between the market participants, which reduce competition and lead to higher prices for consumers. Power is concentrated only in the hands of a few firms, who can dominate the market to gain excessive super normal profits. Oligopolies may be identified using the Concentration Ratios, which measure the proportion of total market share controlled by a given number of firms. When there is high concentration ratio in an industry, economists tend to identify the industry as an Oligopoly. With few sellers, each Oligopolist is likely to be aware of the actions of the others. And the decisions take...
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