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HERFINDAHL INDEX: A measure of concentration of the production in an industry that's calculated as the sum of the squares of market shares for each firm. This is an alternative method of summarizing the degree to which an industry is oligopolistic and the relative concentration of market power held by the largest firms in the industry. The Herfindahl index gives a better indication of the relative market control of the largest firms than can be found with the four-firm and eight-firm concentration ratios.

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GAME THEORY

An analysis that illustrates how the choices between two players affect the outcomes of a "game." Game theory is commonly used to explain the behavior and decision making of oligopolistic firms. It illustrates that cooperation, rather competition, between two "players" can lead to an outcome that is more beneficial to both players.

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Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club trying to buy either a birthday greeting card for your mother that doesn't look like a greeting card or a handcrafted spice rack. Be on the lookout for infected paper cuts.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
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