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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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COMPLEMENT-IN-PRODUCTION

One of two (or more) goods that are simultaneously produced using a given resource. A complement-in-production is one of two alternatives falling within the other prices determinant of supply. The other is a substitute-in-production. An increase in the price of one complement good causes an increase in supply for the other.

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Today, you are likely to spend a great deal of time at an auction wanting to buy either a set of serrated steak knives, with durable plastic handles or a pair of blue silicon oven mitts. Be on the lookout for deranged pelicans.
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Lombard Street is London's equivalent of New York's Wall Street.
"The shifts of fortune test the reliability of friends. "

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