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October 17, 2026 

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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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LAW OF DIMINISHING MARGINAL RETURNS

A principle of short-run production stating that as a firm combines more of a variable input with a fixed input, the marginal product of the variable input eventually declines. This is THE economic principle underlying the analysis of short-run production for a firm. It offers an explanation for the law of supply and the positive slope of the market supply curve.

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Today, you are likely to spend a great deal of time at a crowded estate auction trying to buy either a remote controlled ceiling fan or a how-to book on home decorating. Be on the lookout for celebrities who speak directly to you through your television.
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Three-forths of the gold mined each year is used to manufacture jewelry.
"Do what you feel in your heart to be right ‚ for you'll be criticized anyway. You'll be damned if you do and damned if you don't. "

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