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HERFINDAHL-HIRSHMAN 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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SEVEN ECONOMIC RULES

A set of seven fundamental notions that reflect the study of economics and how the economy operates. They are: (1) scarcity, (2) subjectivity, (3) inequality, (4) competition, (5) imperfection, (6) ignorance, and (7) complexity.

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Today, you are likely to spend a great deal of time touring the new suburban shopping complex seeking to buy either a set of luggage with wheels or a birthday gift for your aunt. Be on the lookout for telephone calls from former employers.
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Much of the $15 million used by the United States to finance the Louisiana Purchase from France was borrowed from European banks.
"Most human beings have an almost infinite capacity for taking things for granted. "

-- Aldous Huxley, writer

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