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I: The standard abbreviation for investment expenditures by the business sector, especially when used in the study of macroeconomics. This abbreviation is most often seen in the aggregate expenditure equation, AE = C + I + G + (X - M), where C, G, and (X - M) represent expenditures by the other three macroeconomic sectors, household, business, and foreign.

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MARGINAL RETURNS

The change in the quantity of total product resulting from a unit change in a variable input, holding all other inputs fixed. Marginal returns is an older and more generic term for marginal product. While marginal product has largely replaced marginal returns in most discussions of short-run production, the phrase does persist in a few terms like the law of diminishing marginal returns.

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WHITE GULLIBON
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Today, you are likely to spend a great deal of time looking for a downtown retail store hoping to buy either a how-to book on home decorating or a set of luggage with wheels. Be on the lookout for infected paper cuts.
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A thousand years before metal coins were developed, clay tablet "checks" were used as money by the Babylonians.
"The roots of education are bitter, but the fruit is sweet."

-- Aristotle, philosopher

PVR
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