chapter 7

Global Markets in Action

Introduction to International Trade

International trade allows countries to consume goods and services beyond their own production capabilities. By engaging in trade, nations can specialize according to their comparative advantage, leading to increased overall welfare.

• Imports: Goods and services purchased from other countries.

• Exports: Goods and services sold to other countries.

Example: Canada imports electronics from Asia and exports wheat to Europe.

How Global Markets Work

International Trade Today

Global trade is a significant component of the world economy. In 2022, global exports and imports totaled $22 trillion, representing 22% of global production. For Canada, exports and imports each accounted for about 30-33% of national production, with services comprising 19% of both exports and imports.

What Drives International Trade?

The primary driver of international trade is comparative advantage, which arises from differences in opportunity costs between countries.

• Comparative Advantage: The ability of a nation to produce a good or service at a lower opportunity cost than another nation.

Example: China has a comparative advantage in T-shirt production, while Canada has a comparative advantage in regional jet manufacturing.

Specialization and Gains from Trade

When countries specialize in goods where they have a comparative advantage and trade, both can achieve higher levels of consumption and welfare.

• Specialization increases total output.

• Trade allows access to cheaper or higher-quality goods.

Market Analysis: Imports and Exports

Why Canada Imports T-Shirts

Without trade, the equilibrium price of a T-shirt in Canada is $8, with 4 million units produced and consumed domestically. With international trade, the world price is $5, leading to increased consumption (6 million), decreased domestic production (2 million), and imports of 4 million T-shirts.

Why Canada Exports Aircraft

Without trade, the equilibrium price of an airplane in Canada is $100 million, with 40 units produced and consumed. With international trade, the world price rises to $150 million, domestic production increases to 70, domestic consumption falls to 20, and Canada exports 50 airplanes.

Winners, Losers, and Net Gains from Trade

Effects of Imports

International trade lowers the price of imported goods, benefiting consumers but harming domestic producers. The net gain from imports is the increase in total surplus (consumer plus producer surplus).

• Consumer Surplus: Expands due to lower prices.

• Producer Surplus: Shrinks due to increased competition.

• Net Gain: The area representing increased total surplus (labeled D in diagrams).

Effects of Exports

International trade raises the price of exported goods, benefiting producers but reducing consumer surplus. The net gain from exports is the increase in total surplus.

• Producer Surplus: Expands due to higher prices.

• Consumer Surplus: Shrinks due to higher prices.

• Net Gain: The area representing increased total surplus (labeled D in diagrams).

International Trade Restrictions

Types of Trade Restrictions

Governments may restrict trade to protect domestic industries using:

• Tariffs: Taxes on imported goods.

• Import Quotas: Limits on the quantity of goods that can be imported.

• Other Import Barriers: Health, safety, and technical regulations.

• Export Subsidies: Payments to domestic producers for exporting goods.

Tariffs

A tariff increases the price of imported goods, reducing imports and generating government revenue, but also causing a deadweight loss.

• Example: A $2 tariff on T-shirts raises the domestic price from $5 to $7, reduces imports, and generates tariff revenue.

Effects of a Tariff

• Consumers pay higher prices and buy less (consumer surplus decreases).

• Domestic producers sell more at higher prices (producer surplus increases).

• Government collects tariff revenue.

• Society experiences a deadweight loss due to inefficient production and reduced consumption.

Import Quotas

An import quota restricts the quantity of a good that can be imported, raising domestic prices and benefiting domestic producers and importers with quota rights, but harming consumers and causing deadweight loss.

Other Import Barriers and Export Subsidies

• Other Import Barriers: Regulations that restrict imports for health, safety, or technical reasons.

• Export Subsidies: Government payments to exporters, leading to overproduction and deadweight loss.

The Case Against Protection

Arguments for Trade Restrictions

Common arguments for restricting trade include:

• Protecting infant industries

• Counteracting dumping

• Saving domestic jobs

• Competing with cheap foreign labor

• Penalizing lax environmental standards

• Preventing exploitation of developing countries

• Reducing offshore outsourcing

However, economic analysis shows that these arguments are often flawed or overstated, and that free trade generally increases overall welfare.

Rent Seeking and Trade Policy

Trade restrictions often persist due to rent seeking, where producers lobby for protection to capture the gains from trade, even though the overall benefit to consumers from free trade is much larger but more diffuse.

Summary Table: Effects of Trade Policies

Policy	Winners	Losers	Net Effect
Free Trade	Consumers (lower prices), Exporting producers	Import-competing producers	Net gain (total surplus maximized)
Tariff	Import-competing producers, Government (tariff revenue)	Consumers	Deadweight loss (inefficiency)
Import Quota	Import-competing producers, Importers with quota rights	Consumers	Deadweight loss (inefficiency)
Export Subsidy	Exporting producers	Taxpayers, Foreign producers	Deadweight loss (overproduction)

Key Formulas and Concepts

• Opportunity Cost: The value of the next best alternative forgone.

• Comparative Advantage: A country has a comparative advantage in producing a good if its opportunity cost of producing that good is lower than in other countries.

• Tariff Revenue: $\text{Tariff Revenue} = \text{Tariff per unit} \times \text{Quantity of imports}$

• Deadweight Loss from Tariff: The loss in total surplus due to inefficient production and reduced consumption caused by the tariff. $\text{Deadweight Loss} = \text{Area C} + \text{Area E}$ (as shown in diagrams)

Conclusion

International trade increases overall economic welfare by allowing countries to specialize according to comparative advantage. While trade creates winners and losers, the net gains to society are positive. Trade restrictions such as tariffs and quotas protect certain groups but reduce total welfare and create inefficiencies. Economic arguments for protection are generally weak, and trade policy is often influenced by rent-seeking behavior rather than overall societal benefit.