ECON 102 Lecture Notes - Lecture 21: Aggregate Demand, Nominal Rigidity, Imperfect Competition

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24 Jun 2016
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ECON 102 Full Course Notes
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ECON 102 Full Course Notes
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Lecture 21 notes: aggregate supply and aggregate demand. In markets with perfect competition, no one firm sets prices. For example, hog-belly futures are traded on the. So there is no pricing power under perfect competition. Imperfect competition: definition: imperfect competition is a downward-sloping demand curve at the firm level. A downward sloping demand curve means that a firm can raise its price without losing all of its business. Equivalently: though the firm may be small compared to the whole economy, a firm is large compared to its own market. Sticky prices mean firms can"t maximize profits in the usual sense. In the standard monopoly profit maximization problem, the choice of output where mc=mr is really a choice of the optimal price, at which customers will purchase that much output. So cost minimization is a key principle of macroeconomics when prices are sticky. Summary of the basics on imperfect competition, sticky prices and.

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