Foundations of Modern Trade Theory: Comparative Advantage
Introduction
- Focus on the Foundations of Modern Trade Theory and Comparative Advantage.
Chapter Outline
- (1 of 2)
- Historical Development of Modern Trade Theory
- Production Possibilities Frontiers
- Trading Under Constant-Cost Conditions
- Dynamic Gains from Trade: Economic Growth
- Changing Comparative Advantage
- Trading under Increasing-Cost Conditions
- The Impact of Trade on Jobs
- (2 of 2)
- Wooster, Ohio, Bears the Brunt of Globalization
- Comparative Advantage Extended to Many Products & Countries
- Factor Mobility, Exit Barriers, and Trade
- Empirical Evidence on Comparative Advantage
- The Case for Free Trade
- Comparative Advantage & Global Supply Chains
Main Concepts
- Basis for trade:
- Understanding why nations export and import specific products.
- Terms of Trade:
- The conditions under which products are exchanged in the world market.
- Gains from International Trade:
- Examines the benefits of production and consumption through trade.
Historical Development of Modern Trade Theory
Mercantilists (1500-1800)
- Advocated for a favorable trade balance: encouraging exports and discouraging imports.
- Prioritized rise in domestic output and employment.
- Supported government regulations on trade through tariffs, quotas, and commercial policies.
Criticisms of Mercantilism
- David Hume’s price-specie-flow doctrine:
- Mentioned that a favorable trade balance is only achievable in the short term.
- Adam Smith in "The Wealth of Nations" (1776):
- Argued against static views of wealth, positing that international trade increases productivity and overall world output.
Why Nations Trade? Absolute Advantage
- Assumption: Differences in production costs arise from varied productivity of factor inputs across nations.
- Absolute Cost Advantage: Nations that require less labor to produce goods.
- Labor Theory of Value: Labor is considered the only production factor within a nation.
Principle of Absolute Advantage
- A theoretical model:
- Envisions a two-nation, two-product scenario.
- Each nation produces goods more efficiently than its trading partner, leading to specialization and mutually beneficial trade.
Case of Absolute Advantage (Table 2.1)
- Output Per Labor Hour:
- United States:
- Wine: 5 bottles
- Cloth: 20 yards
- United Kingdom:
- Wine: 15 bottles
- Cloth: 10 yards
Why Nations Trade: Comparative Advantage
- Recognizes relative cost differences grounded in opportunity costs, providing a basis for trade.
- Highlights that advantageous trades can occur even when one nation has an absolute cost disadvantage for both goods.
Examples of Comparative Advantages in International Trade (Table 2.2)
- Canada: Lumber
- Israel: Citrus fruit
- Italy: Wine
- Jamaica: Aluminum ore
- Mexico: Tomatoes
- Saudi Arabia: Oil
- China: Textiles
- Japan: Automobiles
- South Korea: Steel, ships
- Switzerland: Watches
- United Kingdom: Financial services
Assumptions of Ricardo’s Principle of Comparative Advantage
- The world consists of two nations and two goods.
- Labor is fully employed, homogenous, and the only input.
- Labor can only move freely within nations.
- Technology is fixed across nations with common production methods.
- Costs are fixed relative to labor use regardless of production levels.
- Markets are characterized by perfect competition; firms act as price takers.
- No trade barriers exist; free trade is accepted.
- Transportation costs are zero; consumption preferences are indifferent between domestic and imported goods.
- Production decisions aim to maximize profits; consumers seek to maximize satisfaction.
- No money illusion; all prices are accurately considered in decision-making.
- Trade is in balance, wherein exports cover imports, leading to no international monetary flows.
Comparative Advantage: A Case Study (Table 2.3)
- Output Per Labor Hour:
- United States:
- Wine: 40 bottles
- Cloth: 40 yards
- United Kingdom:
- Wine: 20 bottles
- Cloth: 10 yards
Production Possibilities Frontiers
Definition: Visualizes various combinations of two goods a nation can produce efficiently.
- Indicates maximum production possibilities using land, labor, capital, and entrepreneurship efficiently.
Marginal Rate of Transformation (MRT):
- Reflects the amount of one product sacrificed to obtain an additional unit of another.
- Cost of sacrificing a product denotes its opportunity cost.
- MRT is equal to: Absolute value of the slope of the production possibilities frontier.
Trading Under Constant-Cost Conditions
Concept of Constant Opportunity Costs:
- A straight-line production possibilities frontier suggests factors are perfect substitutes and of uniform quality.
- Autarky: The state of no trade (self-sufficiency).
Gains from Specialization and Trade (Table 2.4):
- Production Gains:
- United States before specialization: 40 Autos, 40 Wheat
- After specialization: 120 Autos, 0 Wheat
- Canada before specialization: 40 Autos, 80 Wheat
- After specialization: 0 Autos, 160 Wheat
- Result: Combined production before specialization is 80 Autos and 120 Wheat; after is 120 Autos and 160 Wheat.
- Consumption Gains:
- Combining production leads to greater total consumption after trade.
Terms of Trade:
- Defines relative prices of traded products; post-trade consumption points are achieved when terms of trade favor the nation.
Domestic Terms of Trade:
- Determined by the exchange rate of exports versus imports, establishing relative prices.
Terms of Trade Requirements:
- International terms of trade must surpass domestic terms of trade for a country to consume beyond their frontier.
Trading Under Constant-Cost Conditions Figures
Figure 2.1: Trading under constant opportunity costs shows the triangular trade between two nations specialized in different areas.
Table 2.5: Commodity Terms of Trade, 2015 (Indexed to 2000=100):
- Germany: 242
- Brazil: 347
- United States: 193
- Australia: 295
- United Kingdom: 162
- Canada: 148
- Others quantified similarly.
Trading Under Increasing-Cost Conditions
Increased opportunity costs yield bowed-outward production possibility frontiers, indicating larger sacrifices for each additional unit produced.
Specialization Process:
- Continues until the relative cost of goods in the two nations converges, leading to equal domestic rates of transformations.
Substantial Consumption Gains and Trade Triangle:
- Reflects efficiencies in imports and exports for nations, encouraging overall production.
Partial Specialization:
- Under increasing costs, nations tend to partially specialize based on comparative advantages until cost differentials diminish.
Dynamic Gains from Trade
- Dynamic Gains can influence growth rates and access to resources through investments and economies of scale.
Changing Comparative Advantage
- Changing productivity patterns evolve over time as firms enhance skills and evolve production outputs from their existing opportunities.
Globalization and its Effects (Wooster, Ohio Case Study)
- The rise of globalization has had severe effects on local industries; for instance, Rubbermaid faced crises due to global pricing pressures leading to layoffs and closures of establishments.
Conclusion
Comparative Advantage Extended:
- Broader discussions surrounding the divisions of comparative advantages among multiple products and countries, stressing the importance of factor mobility and exit barriers.
Empirical Evidence:
- Various studies affirm the Ricardian model of comparative advantage in trade using real-world data.
The Case for Free Trade:
- Advocates emphasize enhanced production, consumption, and innovation through free trade, despite accommodating calls for protectionism in certain sectors.