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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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DEMAND ELASTICITY AND TOTAL EXPENDITURE

The notion that price-induced changes in total expenditure (price times quantity) depend on the relative price elasticity of demand. If demand is relatively elastic, then changes in price cause total expenditure to change in the opposite direction. If demand is relatively inelastic, then changes in price cause total expenditure to change in the same direction. If demand is unit elastic, then changes in price do not cause any change in total expenditure.

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Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club hoping to buy either a flower arrangement for your aunt or a birthday greeting card for your uncle. Be on the lookout for a thesaurus filled with typos.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
"What gets measured gets done."

-- Peter Drucker, educator

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