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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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ABSTRACTION Simplifying the complexities of the real world by ignoring (hopefully) unimportant details while doing economic analysis. Abstraction is an essential feature of the scientific method. Hypothesis verification, model construction, and comparative static analysis are not possible without abstraction.
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GREEN LOGIGUIN [What's This?]
Today, you are likely to spend a great deal of time going from convenience store to convenience store seeking to buy either a half-dozen helium filled balloons or a packet of address labels large enough for addresses of both the sender and the recipient. Be on the lookout for telephone calls from former employers. Your Complete Scope
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A U.S. dime has 118 groves around its edge, one fewer than a U.S. quarter.
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"Success is the ability to go from one failure to another with no loss of enthusiasm." -- Sir Winston Churchill
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MR Marginal Revenue
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