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APC: The abbreviation for average propensity to consume, which is the proportion of income, usually measured as disposable income or national income, used for household consumption expenditures. It is found by dividing consumption by income. The average propensity to consume, abbreviated APC, most often pops up in discussions of Keynesian economics. The average propensity to consume is the average amount of total household income that is devoted consumption expenditures.

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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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APLS

BLUE PLACIDOLA
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Today, you are likely to spend a great deal of time watching the shopping channel seeking to buy either a coffee cup commemorating the moon landing or a how-to book on surfing the Internet. Be on the lookout for a thesaurus filled with typos.
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The word "fiscal" is derived from a Latin word meaning "moneybag."
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ARMA
Autoregressive Moving Average
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