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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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INCOME ELASTICITY OF DEMAND

The relative response of a change in demand to a change in income. More specifically the income elasticity of demand is the percentage change in demand due to a percentage change in buyers' income. This notion of elasticity captures the buyers' income demand determinant. Three other notable elasticities are the price elasticity of demand, the price elasticity of supply, and the cross elasticity of demand.

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BEIGE MUNDORTLE
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Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway trying to buy either a rim for your spare tire or decorative celebrity figurines. Be on the lookout for slow moving vehicles with darkened windows.
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Natural gas has no odor. The smell is added artificially so that leaks can be detected.
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