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MC: The abbreviation for marginal cost, which is the change in total cost (or total variable cost) resulting from a change in the quantity of output produced by a firm in the short run. Marginal cost indicates how much total cost changes for a give change in the quantity of output. Because changes in total cost are matched by changes in total variable cost in the short run (remember total fixed cost is fixed), marginal cost is the change in either total cost or total variable cost. Marginal cost is found by dividing the change in total cost (or total variable cost) by the change in output.

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DOUBLE COINCIDENCE OF WANTS

The requirements of a barter exchange that each trader has want the other wants and wants what the other has. Because everyone does not necessarily want everything, the lack of double coincidence of wants is a major obstacle in barter exchanges, especially for complex, modern economies like that fond in the United States. While double coincidence of wants is also essential for exchanges involving money, it is such an inherent trait of money that it is not a problem. By its very nature as a generally accepted medium of exchange, everyone WANTS money.

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Today, you are likely to spend a great deal of time searching for a specialty store hoping to buy either an AC adapter for your CD player or storage boxes for your family photos. Be on the lookout for letters from the Internal Revenue Service.
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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.
"To sit back and let fate play its hand out, and never influence it, is not the way man was meant to operate."

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MA(N)
A nth-order Moving Average Process
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