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VARIABLE INPUT: An input whose quantity can be changed in the time period under consideration. This should be immediately compared and contrasted with fixed input. The most common example of a variable input is labor. A variable input provides the extra inputs that a firm needs to expand short-run production. In contrast, a fixed input, like capital, provides the capacity constraint in production. As larger quantities of a variable input, like labor, are added to a fixed input like capital, the variable input becomes less productive. This is, by the way, the law of diminishing marginal returns.
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SPECIAL INTEREST GROUPS A group of people with shared interests who have more to gain or lose from a candidate, issue, or policy and thus try extra hard to ensure that the political system is aware of their preferences. Special interest groups are the other side of the coin of voter apathy. Motivated rational choices, some people have little or no involvement in the political system others have a great deal. The study of public choice indicates that special interest groups are one source of government inefficiency. Other sources are politicians, voters, and government bureaucracies.
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Much of the $15 million used by the United States to finance the Louisiana Purchase from France was borrowed from European banks.
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"Divide each difficulty into as many parts as is feasible and necessary to resolve it." -- Rene Descartes
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ATS
Automatic Transfer Service
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