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ASSUMPTIONS, KEYNESIAN ECONOMICS: The macroeconomic study of Keynesian economics relies on three key assumptions--rigid prices, effective demand, and savings-investment determinants. First, rigid or inflexible prices prevent some markets from achieving equilibrium in the short run. Second, effective demand means that consumption expenditures are based on actual income, not full employment or equilibrium income. Lastly, important savings and investment determinants include income, expectations, and other influences beyond the interest rate. These three assumptions imply that the economy can achieve a short-run equilibrium at less than full-employment production.
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MARGINAL REVENUE CURVE, PERFECT COMPETITION A curve that graphically represents the relation between the marginal revenue received by a perfectly competitive firm for selling its output and the quantity of output sold. Because a perfectly competitive firm is a price taker and faces a horizontal demand curve, its marginal revenue curve is also horizontal and coincides with its average revenue (and demand) curve. A perfectly competitive firm maximizes profit by producing the quantity of output found at the intersection of the marginal revenue curve and marginal cost curve.
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PURPLE SMARPHIN
[What's This?]
Today, you are likely to spend a great deal of time searching the newspaper want ads trying to buy either storage boxes for your winter clothes or several magazines on time travel. Be on the lookout for poorly written technical manuals.
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Francis Bacon (1561-1626), a champion of the scientific method, died when he caught a severe cold while attempting to preserve a chicken by filling it with snow.
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"My life as a writer consists of 1/8 talent and 7/8 discipline. " -- John Irving, writer
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DOL
Department of Labor
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