Oligopoly is market structure dominated by small number of larger firms, which are highly dependent on each other. Oligopolies may be identified using concentration ratios, which measure the proportion of total market share controlled by a given number of firms. When there is a high concentration ratio in an industry, economists tend to identify the industry as an oligopoly. Firm in an oligopoly market are highly dependent on each other. They have to see how their decision will affect other firm for example if Toyota starts to give free early checkups for their cars then demand for Toyota will raise at same time demand for Suzuki and Honda will fall. Not only the demand but also the market share will also fall. Another main advantage of oligopolist is the exploitation of economies of scale which is low average cost. There is high barrier to entry in this market for example cost barrier/infrastructure etc. oligopolies may adopt a highly competitive strategy, in which they can go ...
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