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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 PRODUCT AND MARGINAL PRODUCT

A mathematical connection between average product and marginal product stating that the change in the average product depends on a comparison between the average product and marginal product. If marginal product is less than average product, then average product declines. If marginal product is greater than average product, then average product rises. If marginal product is equal to average product, then average product does not change.

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Today, you are likely to spend a great deal of time searching for rummage sales seeking to buy either a how-to book on home remodeling or a tall storage cabinet with five shelves and a secure lock. Be on the lookout for vindictive digital clocks with revenge on their minds.
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The portrait on the quarter is a more accurate likeness of George Washington than that on the dollar bill.
"I do not believe in a fate that will fall on us no matter what we do. I do believe in a fate that will fall on us if we do nothing. "

-- Ronald Reagan, 40th US president

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