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HHI: The common abbreviation for the Herfindahl-Hirshman index (or the Herfindahl index), which is 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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ELASTIC DEMAND

The general demand relation in which relatively small changes in price cause relatively large changes in quantity demanded. Small changes in price cause relatively large changes in quantity demanded or the percentage change in quantity demanded is larger than the percentage change in price. This characterization of elasticity is most important for the price elasticity of demand. Elastic demand is one of two general elasticity relations for demand. The other is inelastic demand.

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Today, you are likely to spend a great deal of time at an auction wanting to buy either a birthday gift for your father that doesn't look like every other birthday gift for your father or a green fountain pen. Be on the lookout for broken fingernail clippers.
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The first paper currency used in North America was pasteboard playing cards "temporarily" authorized as money by the colonial governor of French Canada, awaiting "real money" from France.
"A successful man is one who can lay a firm foundation with the bricks others have thrown at him. "

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