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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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PLANNING HORIZON

Another term for the long-run average cost curve. The long-run average cost curve is termed the planning horizon or planning curve because it provides information that a firm can use to plan factory construction and expansion in the long run.

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Today, you are likely to spend a great deal of time strolling around a discount warehouse buying club hoping to buy either a set of hubcaps or handcrafted decorations to hang on your walls. Be on the lookout for defective microphones.
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General Electric is the only stock from the original 1896 Dow Jones Industrial Average remaining in the current index.
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