Oligopolies exist because of barriers to entry. One of the most important barriers to entry is due to economies of scale when it exists, the industry is more likely to be an oligopoly than a competitive one.
A market structure known as an oligopoly occurs when a few large sellers or manufacturers control a sizable portion of a market or an entire sector. Oligopolies are frequently the outcome of corporate collaboration as a way to increase profits. Because of the decreased competition, customers will pay more and workers will earn less.
In an oligopoly, there must be some entry barriers to allow businesses to capture a sizable portion of the market. These obstacles could be economies of scale or brand loyalty. Entry barriers, however, are lower than monopolies.
Several oligopoly-enabling circumstances have been noted. First off, there aren't many big companies in an oligopolistic market. This feature sets oligopoly apart from monopoly, in which there is only one entity.
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