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AGGREGATE EXPENDITURE LINE: A line representing the relation between aggregate expenditures and gross domestic product used in the Keynesian cross. The aggregate expenditure line is obtained by adding investment expenditures, government purchases, and net exports to the consumption line. As such, the slope of the aggregate expenditure line is largely based on the slope of the consumption line (which is the marginal propensity to consume), with adjustments coming from the marginal propensity to invest, the marginal propensity for government purchases, and the marginal propensity to import. The intersection of the aggregate expenditures line and the 45-degree line identifies the equilibrium level of output in the Keynesian cross.

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PERFECT COMPETITION, CHARACTERISTICS

The four key characteristics of perfect competition are: (1) a large number of small firms, (2) identical products sold by all firms, (3) perfect resource mobility or the freedom of entry into and exit out of the industry, and (4) perfect knowledge of prices and technology.

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YELLOW CHIPPEROON
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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius hoping to buy either a large, stuffed giraffe or a birthday greeting card for your aunt. Be on the lookout for telephone calls from long-lost relatives.
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Post WWI induced hyperinflation in German in the early 1900s raised prices by 726 million times from 1918 to 1923.
"The past cannot be changed. The future is yet in your power. "

-- Hugh White, U.S. Senator

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