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SLOPE, PRODUCTION POSSIBILITIES CURVE: The numerical value of the slope of the production possibilities curve is the opportunity cost of producing the good measured on the horizontal axis.

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CONCENTRATION RATIOS

A family of measures of the proportion of total output in an industry that is produced by a given number of the largest firms in the industry. The two most common concentration ratios are for the four largest firms and the eight largest firms. The four-firm concentration ratio is the proportion of total output produced by the four largest firms in the industry and the eight-firm concentration ratio is proportion of total output produced by the eight largest firms in the industry. Concentration ratios are commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control of the largest firms in the industry. A related measure is the Herfindahl index.

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Today, you are likely to spend a great deal of time wandering around the downtown area wanting to buy either a how-to book on meeting people or clothing for your pet iguana. Be on the lookout for vindictive digital clocks with revenge on their minds.
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The first "Black Friday" on record, a friday marked by a major financial catastrophe, occurred on September 24, 1869 -- A FRIDAY -- when an attempted cornering of the gold market induced a financial crises and economy-wide depression.
"How wonderful it is that nobody need wait a single moment before starting to improve the world. "

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