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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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INSTITUTION

An established method or way of performing an activity that is widely accepted throughout society. Institutions provide the rules, guidelines, and structure needed to carry out day-to-day economic activities, such as production, consumption, and exchange.

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APLS

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Today, you are likely to spend a great deal of time calling an endless list of 800 numbers looking to buy either an instructional DVD on learning to the play the oboe or a small, foam rubber football. Be on the lookout for slow moving vehicles with darkened windows.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
"Whenever you fall, pick up something. "

-- Oswald Avery, scientist

WFTU
World Federation of Trade Unions
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