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MARGINAL UTILITY: The additional utility, or satisfaction of wants and needs, obtained from the consumption or use of an additional unit of a good. It is specified as the change in total utility divided by the change in quantity. Marginal utility indicates what each additional unit of a good is worth to a consumer.

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HERFINDAHL INDEX

A measure of concentration of the production in an industry calculated as the sum of the squares of market shares for each firm. This is one method of summarizing the degree to which an industry is oligopolistic and the concentration of market control held by the largest firms in the industry. Two other measures of industry concentration are the four-firm concentration ratio and the eight-firm concentration ratio.

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Today, you are likely to spend a great deal of time flipping through the yellow pages seeking to buy either a wall poster commemorating yesterday or pink cotton balls. Be on the lookout for mail order catalogs with hidden messages.
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Two and a half gallons of oil are needed to produce one automobile tire.
"It is not the straining for great things that is most effective; it is the doing of the little things, the common duties, a little better and better."

-- Elizabeth Stuart Phelps, Writer

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