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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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MARGINAL COST AND LAW OF DIMINISHING MARGINAL RETURNS Decreasing then increasing marginal cost, reflected by a U-shaped marginal cost curve, is the result of increasing then decreasing marginal returns. In particular the decreasing marginal returns is caused by the law of diminishing marginal returns. As such, the law of diminishing marginal returns affects not only the short-run production of a firm but also the cost of short-run production. This translates into a positively-sloped supply curve for profit-maximizing competitive firms.
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BEIGE MUNDORTLE
[What's This?]
Today, you are likely to spend a great deal of time strolling through a department store seeking to buy either a really, really exciting, action-filled video game or a coffee cup commemorating the moon landing. Be on the lookout for neighborhood pets, especially belligerent parrots.
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This isn't me! What am I?
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Okun's Law posits that the unemployment rate increases by 1% for every 2% gap between real GDP and full-employment real GDP.
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"An organization's ability to learn, and translate that learning into action rapidly, is the ultimate competitive business advantage. " -- Jack Welch, General Electric chief executive
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AIBD
Association of International Bond Dealers (now called International Securities Market Association)
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