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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 the increment in the corresponding total. What's most notable about long-run marginal cost, however, is that we are operating in the long run. Unlike the short run, in which at least one input is fixed, there are no fixed inputs in the long run. As such, there is only variable cost. This means that long-run marginal cost is the result of changes in the cost of all inputs.

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MACROECONOMIC SECTORS

The four aggregate sectors of the macroeconomy--household, business, government, and foreign--that reflect four key macroeconomic functions and are responsible for four expenditures on gross domestic product. These four sectors are the primary "actors" on the macroeconomic stage. Macroeconomic theories then explain macroeconomic phenomena by exploring the interaction among these four sectors.

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Today, you are likely to spend a great deal of time strolling through a department store trying to buy either a cell phone case or a pair of designer sunglasses. Be on the lookout for poorly written technical manuals.
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North Carolina supplied all the domestic gold coined for currency by the U.S. Mint in Philadelphia until 1828.
"As the births of living creatures at first are ill-shapen, so are all innovations, which are the births of time. "

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