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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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MACROECONOMIC PROBLEMS

Undesirable situations that exist in the macroeconomy, largely because one or more of the macroeconomic goals are not satisfactorily attained. The primary problems are unemployment, inflation, and stagnant growth. Macroeconomic theories are designed to explain why these problems emerge and to recommend corrective policies.

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Today, you are likely to spend a great deal of time wandering around the shopping mall hoping to buy either a microwave over that won't burn your popcorn or a T-shirt commemorating the first day of winter. Be on the lookout for pencil sharpeners with an attitude.
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The first "Black Friday" on record, a friday marked by a major financial catastrophe, occurred on September 24, 1869 -- A FRIDAY -- when an attempted cornering of the gold market induced a financial crises and economy-wide depression.
"Give the American people a good cause, and there's nothing they can't lick. "

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