《西方经济学原理》（英文版）Chapter 9 Imperfect Competition and Its Polar Case of Monopoly

ECSENOMICS Chapter 9 Imperfect Competition and Its Polar Case of Monopoly McGraw-Hilllrwin CopyrightC 2001 The McGraw-Hill Companies, Inc. All rights reserved

McGraw-Hill/Irwin Copyright © 2001 The McGraw-Hill Companies, Inc. All rights reserved. Chapter 9 Imperfect Competition and Its Polar Case of Monopoly

ECSENOMICS Acid Test for Imperfect Competition Is t Downward Tilt of Firm's Demand Curve T-71 Figure 9-1 (a) Firm Demand under (b)Firm Demand under Perfect Competition Imperfect Competition d d d B Firm quantity Firm quantity McGraw-Hilllrwin CopyrightC 2001 The McGraw-Hill Companies, Inc. All rights reserved

McGraw-Hill/Irwin Copyright © 2001 The McGraw-Hill Companies, Inc. All rights reserved. T-71 Figure 9-1 Acid Test for Imperfect Competition Is Downward Tilt of Firm’s Demand Curve

ECSENOMICS Market Structure Depends on C Relative Cost and Demand Factors T72 Figure 9-2 (a) Perfect Competition (b)oligopoly (c) Natural Monopoly AC AC AC 0 McGraw-Hilllrwin CopyrightC 2001 The McGraw-Hill Companies, Inc. All rights reserved

McGraw-Hill/Irwin Copyright © 2001 The McGraw-Hill Companies, Inc. All rights reserved. Market Structure Depends on Relative Cost and Demand Factors T-72 Figure 9-2

ECSENOMICS Marginal revenue Curve Comes from Demand Curve T73 Figure 9-3 (a) Ma (b) Total Revenue d AR of fm Output of firm McGraw-Hilllrwin CopyrightC 2001 The McGraw-Hill Companies, Inc. All rights reserved

McGraw-Hill/Irwin Copyright © 2001 The McGraw-Hill Companies, Inc. All rights reserved. Marginal Revenue Curve Comes from Demand Curve T-73 Figure 9-3

ECSENOMICS Profit-Maximizing Equilibrium Can Be Shown Using Either Total or Marginal Curves T-74 Figure 9-4 (a pro fit Maxim ization Mm图结 so0 pomt, slopes ef TC and TR Total cest tma飞ampe自 poat, ope s rere na hanrontal s:30 McGraw-Hilllrwin CopyrightC 2001 The McGraw-Hill Companies, Inc. All rights reserved

McGraw-Hill/Irwin Copyright © 2001 The McGraw-Hill Companies, Inc. All rights reserved. Profit-Maximizing Equilibrium Can Be Shown Using Either Total or Marginal Curves T-74 Figure 9-4