曼昆微观经济学chapter14课件.ppt

14;Learning Objectives;WHAT IS A COMPETITIVE MARKET?;WHAT IS A COMPETITIVE MARKET?;WHAT IS A COMPETITIVE MARKET?;The Revenue of a Competitive Firm;The Revenue of a Competitive Firm;The Revenue of a Competitive Firm;The Revenue of a Competitive Firm;The Revenue of a Competitive Firm;The Revenue of a Competitive Firm;Table 1 Total, Average, and Marginal Revenue for a Competitive Firm;PROFIT MAXIMIZATION AND THE COMPETITIVE FIRM’S SUPPLY CURVE;Table 2 Profit Maximization: A Numerical Example;Figure 1 Profit Maximization for a Competitive Firm;PROFIT MAXIMIZATION AND THE COMPETITIVE FIRM’S SUPPLY CURVE;PROFIT MAXIMIZATION AND THE COMPETITIVE FIRM’S SUPPLY CURVE;Figure 2 Marginal Cost as the Competitive Firm’s Supply Curve;The Firm’s Short-Run Decision to Shut Down;The Firm’s Short-Run Decision to Shut Down;The Firm’s Short-Run Decision to Shut Down;Figure 3 The Competitive Firm’s Short Run Supply Curve;The Firm’s Short-Run Decision to Shut Down;The Firm’s Long-Run Decision to Exit or Enter a Market;The Firm’s Long-Run Decision to Exit or Enter a Market;Figure 4 The Competitive Firm’s Long-Run Supply Curve;THE SUPPLY CURVE IN A COMPETITIVE MARKET;Figure 4 The Competitive Firm’s Long-Run Supply Curve;THE SUPPLY CURVE IN A COMPETITIVE MARKET;Figure 5 Profit as the Area between Price and Average Total Cost;Figure 5 Profit as the Area between Price and Average Total Cost;THE SUPPLY CURVE IN A COMPETITIVE MARKET;The Short Run: Market Supply with a Fixed Number of Firms;Figure 6 Market Supply with a Fixed Number of Firms;The Long Run: Market Supply with Entry and Exit;Figure 7 Market Supply with Entry and Exit;The Long Run: Market Supply with Entry and Exit;Why Do Competitive Firms Stay in Business If They Make Zero Profit?;A Shift in Demand in the Short Run and Long Run;Figure 8 An Increase in Demand in the Short Run and Long Run;Figure 8 An Increase in Demand in the Short Run and Long Run;Figure 8 An Increase in Demand in the Short Run and Long Run;Why the Long-Run Supply C