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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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AVERAGE REVENUE, PERFECT COMPETITION

The revenue received for selling a good per unit of output sold, found by dividing total revenue by the quantity of output. Average revenue often goes by a simpler and more widely used term... price. For a perfectly competitive firm average revenue is also equal to marginal revenue. Average revenue for a perfectly competitive firm is often depicted by a horizontal average revenue curve.

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Today, you are likely to spend a great deal of time driving to a factory outlet seeking to buy either a 200-foot blue garden hose or a video camera with stop action features. Be on the lookout for vindictive digital clocks with revenge on their minds.
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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.
"Being defeated is only a temporary condition; giving up is what makes it permanent."

-- Marilyn vos Savant, Author

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