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SLOPE, AGGREGATE DEMAND CURVE: The aggregate demand curve has a negative slope, reflecting the inverse relation between the price level and aggregate expenditures on real production. A higher price level is related to fewer aggregate expenditures and a lower price level is related to greater aggregate expenditures. The three reasons underlying the negative slope of the AD curve and the inverse relation between the price level and aggregate expenditures on real production are: real-balance effect; interest-rate effect; and net-export effect.

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PERFECT COMPETITION, EFFICIENCY

Perfect competition is an idealized market structure that achieves an efficient allocation of resources. This efficiency is achieved because the profit-maximizing quantity of output produced by a perfectly competitive firm results in the equality between price and marginal cost. In the short run, this involves the equality between price and short-run marginal cost. In the long run, this is seen with the equality between price and long-run marginal cost at the minimum efficient scale of production.

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BEIGE MUNDORTLE
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Today, you are likely to spend a great deal of time searching the newspaper want ads trying to buy either a replacement remote control for your television or a replacement nozzle for your shower. Be on the lookout for letters from the Internal Revenue Service.
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Okun's Law posits that the unemployment rate increases by 1% for every 2% gap between real GDP and full-employment real GDP.
"Opportunities are usually disguised as hard work, so most people don't recognize them."

-- Ann Landers, columnist

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Journal of Policy Analysis and Management
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