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PERFECT COMPETITION, SHORT-RUN PRODUCTION ANALYSIS: A perfectly competitive firm produces the profit-maximizing quantity of output that equates marginal revenue and marginal cost. This production level can be identified using total revenue and cost, marginal revenue and cost, or profit. Because a perfectly competitive firm faces a perfectly elastic demand curve, it efficiently allocates resources by equating price and marginal cost. In addition, the marginal cost curve above the average variable cost curve is the perfectly competitive firm's short-run supply curve.

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SLOPE, AGGREGATE DEMAND CURVE

The negative slope of aggregate demand curve, reflecting the inverse relation between the price level and aggregate expenditures on real production, is attributable to three primary effects--real-balance effect, interest-rate effect, and net-export effect.

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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius trying to buy either a replacement battery for your pocket calculator or a how-to book on home remodeling. Be on the lookout for crowded shopping malls.
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In the Middle Ages, pepper was used for bartering, and it was often more valuable and stable in value than gold.
"Lord, where we are wrong, make us willing to change; where we are right, make us easy to live with. "

-- Peter Marshall, US Senate chaplain

MSE
Mean Squared Error
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