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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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TOTAL COST CURVE A curve that graphically represents the relation between the total cost incurred by a firm in the short-run production of a good or service and the quantity produced. The total cost curve is a cornerstone upon which the analysis of short-run production is built. It combines all opportunity cost of production into a single curve, which can then be used with the total revenue curve to determine profit. The marginal cost curve, THE focal point for the analysis of short-run production, is derived directly from the total cost curve. The shape of the curve reflects increasing marginal returns at small quantities of output and decreasing marginal returns at larger quantities.
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GREEN LOGIGUIN
[What's This?]
Today, you are likely to spend a great deal of time strolling through a department store wanting to buy either a remote controlled train set or a genuine down-filled snow parka. Be on the lookout for infected paper cuts.
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The first paper currency used in North America was pasteboard playing cards "temporarily" authorized as money by the colonial governor of French Canada, awaiting "real money" from France.
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"It is not fair to ask of others what you are unwilling to do yourself. " -- Eleanor Roosevelt, diplomat, activist
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NBER
National Bureau of Economic Research
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