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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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EFFICIENCY

Generating the most possible satisfaction from a given amount of resources. Efficiency means that this satisfaction of wants and needs cannot be increased by producing more of one good and less of another. This is one of the five economic goals and one of two microeconomic goals. The other goals are full employment, stability, economic growth, and equity.

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Today, you are likely to spend a great deal of time surfing the Internet hoping to buy either a birthday gift for your uncle or a pair of red and purple designer socks. Be on the lookout for slow moving vehicles with darkened windows.
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The Dow Jones family of stock market price indexes began with a simple average of 11 stock prices in 1884.
"Don't waste your effort on a thing that results in a petty triumph unless you are satisfied with a life of petty issues. "

-- John D. Rockefeller, industrialist

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