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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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AGGREGATE DEMAND SHIFTS Changes in the aggregate demand determinants cause the aggregate demand curve to shift. The mechanism is comparable to that for market demand determinants and market demand. There are two alternatives--an increase in aggregate demand and a decrease in aggregate demand. An increase in spending by any of the four sectors--household, business, government, and foreign--shifts the aggregate demand curve to right. A decrease in spending by these four sectors shifts the aggregate demand curve to left.
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Today, you are likely to spend a great deal of time surfing the Internet looking to buy either a small palm tree that will fit on your coffee table or several magazines on fashion design. Be on the lookout for telephone calls from long-lost relatives.
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John Maynard Keynes was born the same year Karl Marx died.
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"The roots of education are bitter, but the fruit is sweet." -- Aristotle, Greek philosopher
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ABE
Association of Business Executives
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