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ECONOMIC PROFIT: The difference between business revenue and total opportunity cost. This is the revenue received by a business over and above the minimum needed to produce a good. In this sense, economic profit is a sign of inefficiency. If a business receives an economic profit, then society (the buyers) are spending more on a good than society (the resource owners) are giving up to produce the good.

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LONG-RUN MARGINAL COST

The change in the long-run total cost of producing a good or service resulting from a change in the quantity of output produced. Like all marginals, long-run marginal cost is an increment of the corresponding total. It is the change in long-run total cost divided by, or resulting from, a change in quantity. Long-run marginal cost is guided by returns to scale rather than marginal returns.

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APLS

PURPLE SMARPHIN
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Today, you are likely to spend a great deal of time surfing the Internet looking to buy either a green and yellow striped sweater vest or a Boston Red Sox baseball cap. Be on the lookout for strangers with large satchels of used undergarments.
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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.
"Act well at the moment, and you have performed a good action for all eternity."

-- Johann Kaspar Lavater

WLLN
Weak Law of Large Numbers
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