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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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SOCIAL SCIENCE The scientific study of society--of human behavior and of social interactions. Economics is one of several social sciences. Others are sociology, political science, and anthropology. Economics is considered a social science because it seeks to explain how society deals with the scarcity problem.
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In the late 1800s and early 1900s, almost 2 million children were employed as factory workers.
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"People of mediocre ability sometimes achieve outstanding success because they don't know when to quit. Most men succeed because they are determined to. " -- George Allen, U.S. senator
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LWOP
Leave Without Pay
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