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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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LABOR

The mental and physical human efforts used in the production of goods and services. This is one of four basic categories of resources, or factors of production. The other three are capital, land, and entrepreneurship.

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RED AGGRESSERINE
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Today, you are likely to spend a great deal of time searching for rummage sales wanting to buy either looseleaf notebook paper or a three-hole paper punch. Be on the lookout for vindictive digital clocks with revenge on their minds.
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This isn't me! What am I?

Lewis Carroll, the author of Alice in Wonderland, was the pseudonym of Charles Dodgson, an accomplished mathematician and economist.
"Everyone is bound to bear patiently the results of his own example. "

-- Phaedrus, Philosopher

MPI
Marginal Propensity to Invest
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