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AD: The abbreviation for aggregate demand, which is the total (or aggregate) real expenditures on final goods and services produced in the domestic economy that buyers would willing and able to make at different price levels, during a given time period (usually a year). Aggregate demand (AD) is one half of the aggregate market analysis; the other half is aggregate supply. Aggregate demand, relates the economy's price level, measured by the GDP price deflator, and aggregate expenditures on domestic production, measured by real gross domestic product. The aggregate expenditures are consumption, investment, government purchases, and net exports made by the four macroeconomic sectors (household, business, government, and foreign).
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MARGINAL COST AND LAW OF DIMINISHING MARGINAL RETURNS Decreasing then increasing marginal cost, reflected by a U-shaped marginal cost curve, is the result of increasing then decreasing marginal returns. In particular the decreasing marginal returns is caused by the law of diminishing marginal returns. As such, the law of diminishing marginal returns affects not only the short-run production of a firm but also the cost of short-run production. This translates into a positively-sloped supply curve for profit-maximizing competitive firms.
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BLACK DISMALAPOD
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Today, you are likely to spend a great deal of time at a dollar discount store seeking to buy either a flower arrangement with daisies and carnations for your uncle or a coffee cup commemorating next Thursday. Be on the lookout for poorly written technical manuals.
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Three-forths of the gold mined each year is used to manufacture jewelry.
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"How we spend our days is, of course, how we spend our lives. " -- Annie Dillard, essayist
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CME
Chicago Mercantile Exchange
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