IB DP Economics - Unit 4 - Tariffs-Study Notes - New Syllabus

Tariffs

A tariff is a tax imposed by a government on imported goods and services. Tariffs are a form of trade protection used to increase the price of imports and protect domestic industries from foreign competition.

When a tariff is imposed, imported goods become more expensive, which affects consumers, producers, government revenue, and market efficiency.

Main Objectives of Tariffs:

• Protect domestic industries from foreign competition.
• Reduce imports and improve the balance of trade.
• Raise government revenue.
• Protect employment in domestic industries.

Tariff = Tax on imports → Higher import prices

Effect of a Tariff on the Market

When a tariff is imposed, the domestic price rises from the world price level to a higher price including the tariff.

This leads to changes in consumer behaviour, producer output, imports, and government revenue.

Effect on Consumers

Consumers are generally negatively affected by tariffs.

• Imported goods become more expensive.
• Consumers face higher prices.
• Consumer choice may decrease.
• Consumer surplus decreases.
• Consumers may buy fewer goods due to higher prices.

As a result, consumer welfare declines.

Effect on Producers

Domestic producers usually benefit from tariffs because foreign competition becomes less competitive.

• Domestic firms can increase sales.
• Higher domestic prices increase producer revenue.
• Producer surplus increases.
• Employment in protected industries may rise.

However, reduced competition may lower incentives for efficiency and innovation.

Effect on Government

The government earns revenue from tariffs collected on imports.

• Tariff revenue depends on the quantity of imports.
• Can be used to finance government spending.
• Revenue may decrease if imports fall significantly.

Effect on Market Efficiency

Tariffs create market distortions and reduce allocative efficiency.

• Resources may shift toward less efficient domestic producers.
• Global output may decrease.
• Deadweight welfare loss occurs.
• Consumers pay more for less efficient production.

Therefore, tariffs often create a trade-off between protecting domestic industries and maintaining efficiency.

Stakeholders Affected by Tariffs

A tariff affects multiple stakeholders in the economy because it changes prices, production, imports, and market conditions. Different groups experience different costs and benefits depending on their role in the market.

Main stakeholders affected by tariffs include:

• Consumers
• Domestic producers
• Foreign producers/exporters
• Government
• Workers
• The overall economy

Key Point:

• Tariffs create both winners and losers.
• Domestic industries are protected, but consumers usually face higher prices.
• Foreign firms lose competitiveness in the domestic market.
• Efficiency and welfare may decrease despite producer gains.

Consumers

Consumers are usually negatively affected by tariffs because imported goods become more expensive.

• Higher prices reduce purchasing power.
• Consumer choice may decrease.
• Consumer surplus falls.
• Lower-income consumers may be affected more heavily.

Overall, consumers experience a reduction in welfare.

Domestic Producers

Domestic producers generally benefit from tariffs because foreign competition decreases.

• Sales and revenue may increase.
• Producer surplus rises.
• Protected firms may expand production.
• Some firms may become less efficient due to reduced competition.

Domestic industries gain short-term protection from imports.

Foreign Producers / Exporters

Foreign firms are negatively affected because tariffs reduce demand for imported products.

• Exports become less competitive.
• Sales in foreign markets decline.
• Profits and market share may decrease.
• Exporting countries may experience slower growth.

Foreign producers may also respond through retaliation or trade disputes.

Government

Governments receive tariff revenue from imported goods.

• Tariffs generate tax revenue.
• Government may protect strategic industries.
• Tariffs can support employment policies.
• Trade conflicts may arise with other countries.

Governments must balance protection with efficiency and consumer welfare.

Workers

The effect on workers depends on the industry.

• Workers in protected domestic industries may gain jobs.
• Higher production can increase employment.
• Workers in export industries may suffer if other countries retaliate.
• Consumers who are workers may still face higher living costs.

Therefore, the impact on workers can be mixed.

The Overall Economy

Tariffs affect overall economic performance and efficiency.

• Domestic production may increase.
• Allocative efficiency decreases.
• Deadweight welfare loss occurs.
• Economic growth may slow if trade decreases significantly.

While tariffs protect industries, they may reduce long-term economic efficiency.

Diagram: A tariff and its effect on price, production, consumption, expenditures, revenue, and welfare:

Calculation (HL ONLY): From a diagram, the effects on stakeholders of tariffs:
Here, you simply need to calculate the areas and distances referenced in the diagram above.