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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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DEMAND SPACE

The area on or beneath a demand curve that indicates all possible price-quantity combinations acceptable to buyers. Buyers are willing and able to purchase any price-quantity combination that places them on or below the demand curve, but not above.

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Today, you are likely to spend a great deal of time looking for the new strip mall out on the highway wanting to buy either one of those "hang in there" kitty cat posters or a velvet painting of Elvis Presley. Be on the lookout for letters from the Internal Revenue Service.
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The 22.6% decline in stock prices on October 19, 1987 was larger than the infamous 12.8% decline on October 29, 1929.
"Concentration is the secret of strength in politics, in war, in trade, in short in all management of human affairs. "

-- Ralph Waldo Emerson, philosopher, poet

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