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MARGINAL COST: 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, usually abbreviated MC, is found by dividing the change in total cost (or total variable cost) by the change in output.

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OPEN ECONOMY

An economy that engages in international trade, especially one that exports goods and services to, and imports goods and services from, other economies that make up its foreign sector. It is "open" in the sense that goods and services flow into and out of the country. The alternative to an open economy is a closed economy, one that does not engage in international trade.

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Today, you are likely to spend a great deal of time browsing through a long list of dot com websites wanting to buy either a birthday gift for your grandfather or a pleather CD case. Be on the lookout for fairy dust that tastes like salt.
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The first U.S. fire insurance company was established by Benjamin Franklin in 1752 in Philadelphia.
"Enthusiasm is the greatest asset in the world. It beats money and power and influence. It is no more or less than faith in action. "

-- Henry Chester, Writer

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