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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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PRODUCTION STAGES The three stages of production are characterized by the slopes, shapes, and interrelationships of the total, marginal, and average product curves. The first stage is characterized by a positive slope of the average product curve, ending at the intersection between the average product and marginal product curves; the second stage by continues up to the point in which the marginal product becomes negative, at the peak of the total product curve; and the third stage exists over the range of in which the total product curve is negatively sloped. In Stage I, average product is positive and increasing. In Stage II, marginal product is positive, but decreasing. And in Stage III, total product is decreasing.
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PINK FADFLY
[What's This?]
Today, you are likely to spend a great deal of time driving to a factory outlet seeking to buy either one of those "hang in there" kitty cat posters or a velvet painting of Elvis Presley. Be on the lookout for high interest rates.
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This isn't me! What am I?
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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
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U
Unemployment
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