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KEYNESIAN THEORY: A theory of macroeconomics developed by John Maynard Keynes built on the proposition that aggregate demand is the primary source of business cycle instability, especially recessions. The basic structure of the Keynesian theory of economics was initially presented in Keynes' book The General Theory of Employment, Interest, and Money (1936).

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FOUR-FIRM CONCENTRATION RATIO

The proportion of total output in an industry produced by the four largest firms in an industry. This is one of two common concentration ratios. The other is the eight-firm concentration ratio. Another related measure is the Herfindahl index. The four-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control held by the four largest firms in the industry.

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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 trying to buy either a 50-foot blue garden hose or a turbo-powered vacuum cleaner. Be on the lookout for infected paper cuts.
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The standard "debt" notation I.O.U. does not mean "I owe you," but actually stands for "I owe unto..."
"If I have ever made any valuable discoveries, it has been owing more to patient attention than to any other talent. "

-- Isaac Newton, mathematician, physicist

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