Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 1 Managerial Economics.

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Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 1 Managerial Economics in a Global Economy, 5th Edition by Dominick Salvatore Chapter 8 Market Structure: Perfect Competition, Monopoly and Monopolistic Competition

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 2 Market Structure Perfect Competition Monopolistic Competition Oligopoly Monopoly More Competitive Less Competitive

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 3 Perfect Competition Many buyers and sellers Buyers and sellers are price takers Product is homogeneous Perfect mobility of resources Economic agents have perfect knowledge Example: Stock Market

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 4 Monopolistic Competition Many sellers and buyers Differentiated product Perfect mobility of resources Example: Fast-food outlets

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 5 Oligopoly Few sellers and many buyers Product may be homogeneous or differentiated Barriers to resource mobility Example: Automobile manufacturers

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 6 Monopoly Single seller and many buyers No close substitutes for product Significant barriers to resource mobility –Control of an essential input –Patents or copyrights –Economies of scale: Natural monopoly –Government franchise: Post office

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 7 Perfect Competition: Price Determination

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 8 Perfect Competition: Price Determination

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 9 Perfect Competition: Short-Run Equilibrium Firm’s Demand Curve = Market Price = Marginal Revenue Firm’s Supply Curve = Marginal Cost where Marginal Cost > Average Variable Cost

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 10 Perfect Competition: Short-Run Equilibrium

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 11 Perfect Competition: Long-Run Equilibrium Price = Marginal Cost = Average Total Cost Quantity is set by the firm so that short-run: At the same quantity, long-run: Price = Marginal Cost = Average Cost Economic Profit = 0

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 12 Perfect Competition: Long-Run Equilibrium

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 13 Competition in the Global Economy Domestic Supply Domestic Demand World Supply

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 14 Competition in the Global Economy Foreign Exchange Rate –Price of a foreign currency in terms of the domestic currency Depreciation of the Domestic Currency –Increase in the price of a foreign currency relative to the domestic currency Appreciation of the Domestic Currency –Decrease in the price of a foreign currency relative to the domestic currency

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 15 Competition in the Global Economy Demand for Euros Supply of Euros R = Exchange Rate = Dollar Price of Euros /€ € € €

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 16 Monopoly Single seller that produces a product with no close substitutes Sources of Monopoly –Control of an essential input to a product –Patents or copyrights –Economies of scale: Natural monopoly –Government franchise: Post office

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 17 Monopoly Short-Run Equilibrium Demand curve for the firm is the market demand curve Firm produces a quantity (Q*) where marginal revenue (MR) is equal to marginal cost (MR) Exception: Q* = 0 if average variable cost (AVC) is above the demand curve at all levels of output

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 18 Monopoly Short-Run Equilibrium Q* = 500 P* = $11

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 19 Monopoly Long-Run Equilibrium Q* = 700 P* = $9

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 20 Social Cost of Monopoly

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 21 Monopolistic Competition Many sellers of differentiated (similar but not identical) products Limited monopoly power Downward-sloping demand curve Increase in market share by competitors causes decrease in demand for the firm’s product

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 22 Monopolistic Competition Short-Run Equilibrium

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 23 Monopolistic Competition Long-Run Equilibrium Profit = 0

Prepared by Robert F. Brooker, Ph.D. Copyright ©2004 by South-Western, a division of Thomson Learning. All rights reserved.Slide 24 Monopolistic Competition Long-Run Equilibrium Cost without selling expenses Cost with selling expenses

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