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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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PROPRIETORS' INCOME

The official factor payment item in the National Income and Product Accounts maintained by the Bureau of Economics Analysis measuring the combined payments for all four factors of production used in owner-operated business firms. Specifically, proprietors' income is the excess of revenue over explicit production cost of owner-operated businesses and includes payments for labor, capital, land, and entrepreneurship. This is one of five official factor payments making up national income. The other four are compensation of employees, rental income of persons, net interest, and corporate profits. Proprietors' income is usually less than 10 percent of national income, typically in the 7 to 10 percent range.

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Today, you are likely to spend a great deal of time at a flea market wanting to buy either a T-shirt commemorating yesterday or a pair of handcrafted oven mitts. Be on the lookout for fairy dust that tastes like salt.
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On a typical day, the United States Mint produces over $1 million worth of dimes.
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