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TRADE SURPLUS: Formally termed a balance of trade surplus, a condition in which a nation's exports are greater than imports. In other words, a country is buying less stuff from foreigners than foreigners are buying from domestic producers. A trade surplus is usually thought to be a good thing for a country. However, every country in the world cannot run a trade surplus at the same time. Excessive trade surpluses can also lead to invasion by sizable foreign armies.
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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 (MC) indicates how much total cost changes for a given change in the quantity of output. Because changes in total cost are matched by changes in total variable cost in the short run (total fixed cost is fixed), marginal cost is the change in either total cost or total variable cost. It is found by dividing the change in total cost (or total variable cost) by the change in output. Marginal cost is one of four cost concepts used in short-run production analysis. The other three are average total cost, average fixed cost, and average variable cost.
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John Maynard Keynes was born the same year Karl Marx died.
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"Man is born to live, not to prepare for life. " -- Boris Pasternak, writer
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ATS
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