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EFFICIENCY: Obtaining the most possible satisfaction from a given amount of resources. Efficiency for our economy is achieved when we can not increase our satisfaction of wants and needs by producing more of one good and less of another. This is one of the five economic goals, specifically one of the two micro goals (the other being equity).

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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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Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors wanting to buy either a packet of address labels large enough for addresses of both the sender and the recipient or a key chain with a built-in flashlight and panic button. Be on the lookout for mail order catalogs with hidden messages.
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Lombard Street is London's equivalent of New York's Wall Street.
"If you worried about falling off the bike, you'd never get on. "

-- Lance Armstrong, bicycle racer

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