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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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POSITIVE ECONOMICS The branch of economics that seeks to explain the way the economy actually operates. It is the application of the scientific method and the process of testing hypothesis to economic phenomena. A positive economic statement is one that can be refuted by looking at the real world--that is, by testing a hypothesis.
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ORANGE REBELOON
[What's This?]
Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius hoping to buy either any book written by Isaac Asimov or a how-to book on building remote controlled airplanes. Be on the lookout for mail order catalogs with hidden messages.
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This isn't me! What am I?
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Two and a half gallons of oil are needed to produce one automobile tire.
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"Nobody can be successful unless he loves his work. " -- David Sarnoff, TV pioneer
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LAN
Locally Asymptotically Normal
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