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SIGNALLING: The use of low-cost, easy to obtain information about a product or commodity to indicate the quality of a product. Signalling occurs when buyers use features of a commodity or actions by the seller to indicate overall product quality. These signals can be either intended or unintended.

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VARIABLE INPUT

An input whose quantity can be changed in the time period under consideration. The most common example of a variable input is labor. Variable inputs provide the means used by a firm to control short-run production. The alternative to variable input is fixed input. 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, which is the law of diminishing marginal returns.

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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers wanting to buy either a New York Yankees baseball cap or several magazines on home repairs. Be on the lookout for spoiled cheese hiding under your bed hatching conspiracies against humanity.
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Much of the $15 million used by the United States to finance the Louisiana Purchase from France was borrowed from European banks.
"After climbing a great hill, one finds many more hills to climb. "

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