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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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MIDPOINT ELASTICITY FORMULA

A simple technique for calculating the coefficient of elasticity by estimating the average elasticity for discrete changes in two variables. The distinguishing characteristic of this formula is that percentage changes are calculated based on the average of the initial and ending values of each variable, rather than initial values. An alternative technique is the endpoint elasticity formula.

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Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club trying to buy either decorative celebrity figurines or a flower arrangement with anything but tulips for your grandfather. Be on the lookout for defective microphones.
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Two and a half gallons of oil are needed to produce one automobile tire.
"If you don't know where you are going, any road will get you there."

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GSP
Gross State Product, Generalized System of Preferences
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