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HERFINDAHL-HIRSHMAN 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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EXCHANGE

The process of trading one valuable commodity (good, service, or resource) for another. An exchange can be voluntary, such as what transpires through a market, or involuntary, such as when taxes are imposed by government.

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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius seeking to buy either a replacement remote control for your stereo system or a computer that can play video games and burn DVDs. Be on the lookout for door-to-door salesmen.
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Three-forths of the gold mined each year is used to manufacture jewelry.
"The creative is the place where no one else has ever been. the You have to leave the city of your comfort and go into wilderness of your intuition. What you'll discover will be wonderful. What you'll discover will be yourself."

-- Alan Alda, Actor

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