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AGGREGATE EXPENDITURES: The total expenditures on gross domestic product undertaken in a given time period by the four sectors -- household, business, government, and foreign. Expenditures made by each of these sectors are specifically labeled consumption expenditures, investment expenditures, government purchases, and net exports. Aggregate expenditures (AE) are a cornerstone in the study of macroeconomics, playing critical roles in Keynesian economics, aggregate market analysis, and to a lesser degree, monetarism.

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SHORT-RUN PRODUCTION ALTERNATIVES

A firm faces three production options in the short run based on a comparison between price, average total cost, and average variable cost. If price is greater than average total cost, a firm earns an economic profit by producing the quantity that equates marginal revenue with marginal cost. If price is less than average total cost but greater than average variable cost, a firm incurs an economic loss, but produces the quantity that equates marginal revenue with marginal cost. If price is less than average variable cost, a firm shuts down production in the short run, incurring an economic loss equal to total fixed cost.

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Today, you are likely to spend a great deal of time flipping through the yellow pages seeking to buy either a wall poster commemorating yesterday or pink cotton balls. Be on the lookout for mail order catalogs with hidden messages.
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Post WWI induced hyperinflation in German in the early 1900s raised prices by 726 million times from 1918 to 1923.
"It is not the straining for great things that is most effective; it is the doing of the little things, the common duties, a little better and better."

-- Elizabeth Stuart Phelps, Writer

DPI
Disposable Personal Income
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