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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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AUTONOMOUS INVESTMENT

Business investment expenditures that do not depend on income or production (especially national income or even gross domestic product). That is, changes in income do not generate changes in investment. Autonomous investment is best thought of as investment that the business sector undertakes regardless of the state of the economy. It is measured by the intercept term of the investment line. The alternative to autonomous investment is induced investment, which does depend on income.

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Today, you are likely to spend a great deal of time going from convenience store to convenience store looking to buy either a how-to book on home repairs or a large, stuffed kitty cat. Be on the lookout for gnomes hiding in cypress trees.
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In the early 1900s around 300 automobile companies operated in the United States.
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