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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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AVERAGE REVENUE CURVE, PERFECT COMPETITION

A curve that graphically represents the relation between average revenue received by a perfectly competitive firm for selling its output and the quantity of output sold. Because average revenue is essentially the price of a good, the average revenue curve is also the demand curve for a perfectly competitive firm's output.

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BROWN PRAGMATOX
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Today, you are likely to spend a great deal of time searching the newspaper want ads trying to buy either an AC adapter for your CD player or storage boxes for your family photos. Be on the lookout for high interest rates.
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In the late 1800s and early 1900s, almost 2 million children were employed as factory workers.
"I think luck is the sense to recognize an opportunity and the ability to take advantage of it . The man who can smile at his breaks and grabs his chance gets on."

-- Samuel Goldwyn, Film executive

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American Bankers Association, Associate in Business Administration
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