What are the main types of trade protection measures discussed in Trade Protection II?

In Trade Protection II, the main types of trade protection measures include tariffs, quotas, subsidies, and non-tariff barriers. Tariffs are taxes imposed on imported goods, quotas set a physical limit on the quantity of a good that can be imported, subsidies are financial aids given to local businesses to make them more competitive, and non-tariff barriers include regulations and standards that make it difficult for foreign goods to enter the market.

How do tariffs impact domestic consumers and producers in the context of Trade Protection II?

Tariffs can lead to higher prices for imported goods, which may benefit domestic producers by reducing foreign competition. However, they can negatively impact domestic consumers by increasing the cost of goods. In the IB DP Economics curriculum, students learn that while tariffs can protect local industries, they can also lead to inefficiencies and a decrease in overall economic welfare.

Why might a government choose to implement quotas as a trade protection measure?

Governments might implement quotas to protect domestic industries from foreign competition by limiting the number of foreign goods entering the market. This can help preserve jobs and promote local businesses. In the IB DP Economics syllabus, quotas are discussed as a way to manage trade balance and protect strategic industries, but they can also lead to higher prices and limited choices for consumers.

What are the potential drawbacks of using subsidies as a form of trade protection?

Subsidies can distort market competition by giving domestic producers an unfair advantage, potentially leading to inefficiencies and overproduction. They can also strain government budgets and lead to trade disputes. In the context of the IB DP Economics curriculum, students explore how subsidies can lead to retaliatory measures from other countries and disrupt international trade relations.

How do non-tariff barriers affect international trade according to Trade Protection II?

Non-tariff barriers, such as stringent regulations and standards, can restrict international trade by making it difficult for foreign goods to enter a market. These barriers can protect domestic industries but may also lead to trade tensions and reduce the variety of goods available to consumers. In the IB DP Economics course, non-tariff barriers are analyzed for their impact on trade efficiency and global economic relations.

Why is "Saying protection is always bad." a common mistake in Trade Protection II?

Why it happens: Textbook bias. How to avoid it: Some arguments (infant industry, anti-dumping, strategic) have economic merit. Evaluate case by case.

The Global EconomyIB Economics SL

Trade Protection II

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Trade Protection II — IB Economics SL: arguments for and against, WTO, real-world cases

Unit 4.3 of the 2022+ syllabus. The arguments for protection (infant industries, jobs, dumping, strategic) and against (efficiency, retaliation, consumer cost) plus the role of the WTO.

What you’ll learn

Mapped to the IB DP Economics SL subject guide (2022 onwards (first assessment May 2024)).

4.3.1 — Identify arguments for and against trade protection.
4.3.2 — Explain the role of the WTO.
4.3.3 — Evaluate real-world protection cases.

Arguments and the WTO

When, if ever, should countries protect?

Arguments FOR protection:

Argument	Example
Infant industry	Protect new industries until they reach competitive scale (e.g. South Korean steel, Brazilian autos historically)
Anti-dumping	Prevent foreign firms selling below cost to drive out domestic competition
Protect jobs	Avoid mass unemployment in import-competing sectors (e.g. US steel tariffs)
Strategic / national security	Maintain domestic capacity in defence, food, energy
Balance of payments support	Reduce imports if trade deficit is unsustainable
Government revenue	Tariffs are a major revenue source in low-income countries with weak tax systems
Environmental / labour standards	Stop imports from countries with weak rules ('race to the bottom')
Retaliation	Match a partner's tariffs to force fair behaviour

Arguments AGAINST:

Deadweight loss — welfare lost on every protected market.
Retaliation and trade wars — partners may impose own tariffs (US-China 2018-).
Higher consumer prices — particularly harmful to low-income households.
Inefficient industries persist — protected from competition, slow to innovate.
Reduced choice and variety.
Slower long-run growth — empirical evidence shows protection associated with slower growth, except in early phases of industrialisation.
Trade as tool for development is undermined.

Evaluation. Most economists believe free trade is BEST in the long run for global welfare, but accept:

TEMPORARY infant-industry protection may be justified IF accompanied by export discipline.
Anti-dumping action is legitimate against clearly predatory pricing.
National security protections are needed in narrow strategic sectors.
Developing countries need policy space to develop industries.

World Trade Organization (WTO). Founded 1995 from GATT. ~165 members covering >95% of world trade.

Functions:

Provides forum for negotiating trade agreements.
Sets RULES for trade.
Settles disputes via panels and Appellate Body.
Provides technical assistance to developing countries.

Key principles:

MFN (Most Favoured Nation): a tariff concession to one trading partner must be extended to ALL.
National treatment: imported goods, once in the country, must be treated the same as domestic.
Tariff bindings: agreed maximum tariffs that can't be raised without compensation.
Transparency: trade policies must be published.

Limitations:

Slow dispute resolution.
Appellate Body paralysed since 2019 (US blocking appointments).
Limited rules on services and digital trade.
Bilateral and regional deals proliferating.

Real-world cases:

US-China trade war (2018-): tit-for-tat tariffs; widespread welfare losses; supply chain reorganisation.
EU Common Agricultural Policy: subsidies and tariffs protect farmers; criticised as protectionist.
Brexit: UK left EU customs union; trade frictions with EU.
CHIPS Act (US 2022): subsidies for semiconductor production — supply chain industrial policy.

Arguments FOR: infant industry, anti-dumping, jobs, strategic, BoP, revenue.
Arguments AGAINST: DWL, retaliation, inefficiency, consumer cost.
WTO: rules, disputes, MFN, transparency.
Modern challenges: paralysed appellate, US-China war.

How it’s examined

Paper 1: 'Discuss the arguments for and against tariff protection.' Paper 2: identify protection in a case study and evaluate.

Sources: IB Diploma Programme Economics subject guide (IBO, 2020 — first assessment 2022). Last reviewed 2026-05-31.

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Step-by-step worked examples — Trade Protection II

Step-by-step solutions to past-paper-style questions on trade protection ii, written exactly the way a tutor would explain them at the board.

1Infant industry argument
Stretch• arguments
Question
Discuss the infant industry argument with one historical example. (5 marks)
Step-by-step solution
1. Step 1
  Argument: protect new industries until they reach competitive scale (learning, economies of scale).
2. Step 2
  Example: South Korea's heavy chemical and steel industries in 1960s-70s — protected, subsidised, then became globally competitive (POSCO).
3. Step 3
  Strength: addresses real market failures (learning externalities, capital market failures).
4. Step 4
  Weakness: industries often never grow up; protection becomes permanent; rent-seeking.
5. Step 5
  Best practice: TEMPORARY protection with EXPORT DISCIPLINE (must hit export targets to keep support).
Answer
Valid in theory; depends on temporary protection + export discipline; success requires graduation.
2Trade war effects
Stretch• trade war
Question
Discuss the welfare effects of the US-China trade war (2018-). (5 marks)
Step-by-step solution
1. Step 1
  Both countries imposed tariffs on each other's exports — direct cost to importers.
2. Step 2
  US consumers paid higher prices (mostly tariff passed through); deadweight loss in both countries.
3. Step 3
  Producer effects: some shielded industries gained; export industries hit by retaliation lost.
4. Step 4
  Supply chain disruption; some production shifted from China to Vietnam, Mexico, India — adjustment costs.
5. Step 5
  Net effect: lower welfare in both countries; benefited third-party producers (Vietnam etc.) somewhat.
Answer
Both sides lost welfare; some industries gained; supply chains reorganised; third parties benefited.
3Role of the WTO
Building confidence• WTO
Question
Outline TWO functions of the WTO. (2 marks)
Step-by-step solution
1. Step 1
  Negotiates and administers trade agreements (rules-based system, MFN principle).
2. Step 2
  Settles trade disputes between member countries (panels and Appellate Body).
Answer
Negotiating trade rules; settling disputes (also: transparency, technical assistance).

Key Definitions and Keywords — Trade Protection II

Definitions to memorise and the exact keywords mark schemes credit for trade protection ii answers — sharpened from recent examiner reports for the 2026 IB DP Economics SL sitting.

Infant industry argument
Examiner keyword
Justification for temporary protection of new industries until they achieve competitive scale.
World Trade Organization (WTO)
Examiner keyword
International body that administers trade rules, settles disputes, and promotes liberalisation since 1995.
Most Favoured Nation (MFN)
Examiner keyword
WTO principle requiring that a tariff concession to one trading partner be extended to all WTO members equally.

Common Mistakes and Misconceptions — Trade Protection II

The traps other students keep falling into on trade protection ii questions — taken from recent IB DP Economics SL examiner reports and mark schemes — and how to avoid them.

✕Saying protection is always bad.
Why it happens
Textbook bias.
How to avoid it
Some arguments (infant industry, anti-dumping, strategic) have economic merit. Evaluate case by case.

Past paper style quiz

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Trade Protection II — frequently asked questions

The things students keep getting wrong in this sub-topic, answered.

Trade Protection II

Short Study Notes in the form of Slides

Short Study Notes — Trade Protection II

Detailed Notes

What you’ll learn

How it’s examined

1Infant industry argument

2Trade war effects

3Role of the WTO

Infant industry argument

World Trade Organization (WTO)

Most Favoured Nation (MFN)

✕Saying protection is always bad.

Past paper style quiz

Trade Protection II — frequently asked questions