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Oligopoly In microeconomics, an oligopoly (Greek oligo few, polio seller) is a market form in which it is dominated by a small number of sellers (oligopolists oligopoly "). Because there are few participants in this market, each oligopoly is aware of the actions of others. The decisions of a company, alter or influence the decisions of others. Through his position exert market power are causing higher prices and production is lower. These companies maintain that power by collaborating with them thus avoiding competition. The oligopoly implies the existence of several companies offering the same product, but so that none can be imposed entirely on the market. There is therefore a constant struggle between them to be the most market share in the firms make strategic decisions continuously, taking into account the strengths and weaknesses of the business structure of each.The transcendent thus in the oligopoly, there is close interaction between producers, not the number of enterprises in the market.