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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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ENDPOINT ELASTICITY FORMULA

A simple technique for calculating the coefficient of elasticity by estimating the elasticity for discrete changes in two variables using the initial values of each. The distinguishing characteristic of this formula is that percentage changes are calculated based on the initial values of each variable. An alternative technique is the midpoint elasticity formula.

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APLS

GREEN LOGIGUIN
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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 a how-to book on the art of negotiation or a flower arrangement for your aunt. Be on the lookout for mail order catalogs with hidden messages.
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This isn't me! What am I?

Lewis Carroll, the author of Alice in Wonderland, was the pseudonym of Charles Dodgson, an accomplished mathematician and economist.
"All things are difficult before they are easy."

-- Thomas Fuller, Physician

MPP
Marginal Physical Product
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