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There are four distinct markets structures in the American economy. These four markets are, pure competition, pure monopoly, monopolistic competition, and oligopoly. These four market models differ as to the number of firms in the industry, whether those firms produce standardized products, or try to differentiate their products from those of other firms, and how easy or difficult it is for firms to enter the industry. First, pure competition market involves a very large number …

…OPEC, auto manufacturing, such as General Motors, Ford, Toyota, and firms, such as Coca Cola and Pepsi Cola. AT&T is another example of oligopoly, because now it is the most powerful in long lines and computer technology. In summary pure competition, pure monopoly, monopolistic competition and oligopoly are four basic model of market structure. However, pure competition and pure monopoly are the structures in which most markets structures fall in the United States economy.