Relative Prices and Supply Trade in a One-Factor World Determining the Relative Price After Trade Box:Comparative Advantage in Practice:The Case of Babe Ruth The Gains from Trade A Note on Relative Wages Box:The Losses from Nontrade Misconceptions About Comparative Advantage Productivity and Competitiveness The Pauper Labor Argument Comparative Advantage with Many Goods Setting Up the Model Relative Wages and Specialization Determining the Relative Wage in the Multigood Model Adding Transport Costs and Nontraded Goods Empirical Evidence on the Ricardian Model (3)Thinking and Practice 1.The main idea of the law of Comparative advantage 2.The main idea of the law of Absolute Advantage (4)Teaching Method Multimedia Teaching:Discussion 思政内容：介绍国际粮食贸易，以及我国相关的政策措施，突出我国始终把粮 食安全放在首位。 Chapter 4 Specific Factors and Income Distribution (1)Teaching targets and requirements:Understand how a mobile factor will respond to price changes by moving across sectors.Explain why trade will generate both winners and losers in the short run.Understand the mean trade ng of gains from tr ade when there are losers. Discus e re ious issue.Expla h argument favor of free tra e despite the existence of losers (2)Teaching Contents The Specific Factors Model Assumptions of the Model Produ Prices,Wages,and Labor Allocation Relative Prices and Supply Trade in a One-Factor World Determining the Relative Price After Trade BOX: Comparative Advantage in Practice: The Case of Babe Ruth The Gains from Trade A Note on Relative Wages BOX: The Losses from Nontrade Misconceptions About Comparative Advantage Productivity and Competitiveness The Pauper Labor Argument Comparative Advantage with Many Goods Setting Up the Model Relative Wages and Specialization Determining the Relative Wage in the Multigood Model Adding Transport Costs and Nontraded Goods Empirical Evidence on the Ricardian Model （3）Thinking and Practice 1. The main idea of the law of Comparative advantage 2. The main idea of the law of Absolute Advantage （4）Teaching Method Multimedia Teaching；Discussion 思政内容：介绍国际粮食贸易，以及我国相关的政策措施，突出我国始终把粮 食安全放在首位。 Chapter 4 Specific Factors and Income Distribution （1）Teaching targets and requirements：Understand how a mobile factor will respond to price changes by moving across sectors. Explain why trade will generate both winners and losers in the short run. Understand the meaning of gains from trade when there are losers. Discuss the reasons why trade is a politically contentious issue. Explain the arguments in favor of free trade despite the existence of losers. （2）Teaching Contents The Specific Factors Model Assumptions of the Model Production Possibilities Prices, Wages, and Labor Allocation