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EIGHT-FIRM CONCENTRATION RATIO: The proportion of total output in an industry that's produced by the eight largest firms in the industry. This is one of two common concentration ratios. The other is the four-firm concentration ratio. The eight-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and how market control is held by the eight largest firms in the industry.

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AGGREGATE DEMAND DECREASE, LONG-RUN AGGREGATE MARKET

A shock to the long-run aggregate market caused by a decrease in aggregate demand resulting in and illustrated by a leftward shift of the aggregate demand curve. A decrease in aggregate demand in the long-run aggregate market results in an increase in the price level but no change in real production. The level of real production resulting from the aggregate demand shock is full-employment real production.

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Today, you are likely to spend a great deal of time strolling through a department store hoping to buy either several magazines on fashion design or a package of 3 by 5 index cards, the ones without lines. Be on the lookout for neighborhood pets, especially belligerent parrots.
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Only 1% of the U.S. population paid income taxes when the income tax was established in 1914.
"No amount of business school training or work experience can teach what is ultimately a matter of personal character. "

-- Truett Cathy, Chick-fil-A Inc. founder

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