International trade and globalisation: IGCSE Economics Complete Notes

Why does your morning routine depend on other countries?

Think about everything you used before you left the house this morning. Your phone was probably assembled in China from components made in South Korea, Japan, and the United States. The cotton in your shirt may have been grown in India, woven in Bangladesh, and branded in Europe. The cocoa in your breakfast cereal likely started life on a farm in Ghana or Ivory Coast. You hadn't even reached the school gate, and you'd already benefited from international trade dozens of times over.

That is the heart of Section 6 of your IGCSE Economics syllabus. International trade and globalisation explain why countries exchange goods and services with each other, what happens when governments try to restrict that exchange, how currencies are valued, and how we measure a country's trade performance. These topics appear regularly on both Paper 1 and Paper 2, and the good news is that the underlying logic connects directly to the demand-and-supply thinking you already know.

This guide walks you through every key concept in the section, flags the mistakes that cost students marks, and gives you practice opportunities along the way.

Specialisation and free trade

What is specialisation by country?

You have already met the idea of specialisation at the individual and firm level earlier in the course. Country-level specialisation works on the same principle: a country concentrates its resources on producing the goods and services it can make most efficiently, then trades its surplus for the things other countries produce better.

The basis for specialisation comes down to two things the examiner wants you to mention explicitly:

• Best resource allocation - a country uses its land, labour, capital, and enterprise where they generate the most output. Saudi Arabia specialises in oil because it has vast petroleum reserves. Bangladesh specialises in garment manufacturing because it has a large, low-cost labour force.
• Low-cost production - when a country can produce a good at a lower opportunity cost than another country, it makes economic sense for that country to specialise. This is the core of comparative advantage, and it means trade can benefit both parties even if one country is absolutely better at producing everything.

Advantages of specialisation

• Higher total world output, because each country directs resources to their most productive use
• Lower average costs through economies of scale, since firms produce larger quantities for export markets
• Greater variety of goods available to consumers
• Higher living standards as countries access goods they could not produce efficiently themselves
• Encourages innovation as firms compete in international markets

Disadvantages of specialisation

• Over-dependence on a narrow range of products - if global demand for that product falls or prices drop, the whole economy suffers. Many oil-exporting nations experienced this when oil prices collapsed.
• Vulnerability to external shocks - a disease wiping out a single crop can devastate an economy built around that crop.
• Structural unemployment - workers in declining industries may lack the skills needed in the specialised sector.
• Depletion of natural resources - a country specialising in mining or logging may exhaust finite resources.
• Loss of self-sufficiency - relying on imports for essential goods (food, energy) creates strategic risks during conflicts or supply chain disruptions.

Free trade: definition, advantages, and disadvantages

Free trade is the exchange of goods and services between countries without government-imposed barriers such as tariffs, quotas, or subsidies. It allows market forces of demand and supply to determine what is traded, in what quantities, and at what prices.

Advantages of free trade:

• Consumers benefit from lower prices and greater choice
• Promotes efficient resource allocation globally
• Encourages competition, which drives innovation and keeps prices down
• Allows developing countries to access larger markets for their exports
• Strengthens diplomatic relationships between trading partners

Disadvantages of free trade:

• Domestic industries may be unable to compete with cheaper imports and may close, causing unemployment
• Infant industries in developing countries may never get the chance to grow if exposed to full international competition immediately
• Countries may become dependent on imports for essential goods
• Environmental standards may be undermined if production shifts to countries with weaker regulations
• Benefits of trade may be distributed unevenly, widening inequality within and between countries

Globalisation and trade restrictions

Understanding globalisation

Have you ever noticed how the same brands appear in shopping centres across completely different countries? That visibility is one face of globalisation. Globalisation is the process by which the world's economies have become increasingly interconnected through the growth of international trade, investment, and the movement of labour and technology across borders.

Several factors have accelerated globalisation:

• Improvements in transport - containerisation slashed shipping costs, making it profitable to move goods across oceans
• Advances in communication technology - the internet and mobile networks allow businesses to coordinate supply chains that span multiple continents
• Reduction in trade barriers - organisations like the World Trade Organization (WTO) have encouraged countries to lower tariffs and open markets
• Growth of multinational corporations (MNCs) - large firms operate in many countries, moving capital and production to wherever costs are lowest
• Deregulation of financial markets - capital flows more freely between countries, funding investment in new markets

Why do governments restrict trade?

If free trade has so many advantages, you might wonder why governments ever restrict it. The answer is that trade creates winners and losers within each country, and governments sometimes choose to protect the losers. Here are the main reasons for trade restrictions:

1. Protecting infant industries - new industries in developing countries may need temporary protection from established foreign competitors until they achieve economies of scale
2. Protecting employment - if cheap imports threaten jobs in a domestic industry, the government may restrict those imports to preserve employment
3. Preventing dumping - dumping occurs when a foreign firm sells goods below cost in another country's market to drive out local competitors. Anti-dumping duties counter this
4. Correcting a balance of payments deficit - restricting imports can reduce the outflow of money and help balance the current account
5. Raising government revenue - tariffs generate income for the government, which is especially important in developing countries where income tax collection is limited
6. Protecting strategic industries - defence, agriculture, and energy are considered too important to national security to rely on imports
7. Maintaining health, safety, and environmental standards - restrictions can prevent the import of goods that do not meet domestic standards

Types of trade restriction

Cambridge expects you to know the main forms of protectionism and be able to explain how each one works.

Advantages and disadvantages of protectionism

Advantages:

• Protects jobs in vulnerable industries during the short term
• Gives infant industries breathing room to develop
• Raises revenue (tariffs)
• Prevents dumping and unfair competition
• Preserves strategic industries essential to national security

Disadvantages:

• Higher prices for consumers
• Reduced choice and lower quality, since domestic firms face less competitive pressure
• Retaliation from trading partners, leading to trade wars that harm everyone
• Misallocation of resources, since protected industries may be inefficient
• May prop up declining industries rather than encouraging workers to retrain

Globalisation: deeper impacts

Effects of globalisation on different groups

Examiners frequently ask you to evaluate the effects of globalisation, and the strongest answers recognise that the impact differs depending on who you are asking about.

For consumers: Globalisation generally means lower prices, wider product choice, and access to new technologies. Your ability to stream music from artists around the world or buy affordable clothing produced overseas are direct results of globalised markets.

For workers: The picture is mixed. Workers in export industries benefit from increased demand and potentially higher wages. But workers in industries that face cheap foreign competition may lose their jobs. This is especially acute in manufacturing sectors of developed countries, where production has shifted to lower-cost economies.

For firms: Globalisation opens larger markets and allows firms to source inputs from wherever they are cheapest. Multinational corporations can locate different stages of production in different countries. However, small domestic firms may struggle to compete with large international rivals.

For governments: Increased trade raises tax revenue through tariffs and boosts economic growth, but governments may find it harder to regulate multinational corporations that can shift profits to low-tax jurisdictions. There is also pressure to lower environmental and labour standards to attract foreign investment.

For developing countries: Globalisation can bring foreign direct investment (FDI), technology transfer, and employment. But it can also create dependency on foreign capital, environmental degradation, and exploitation of cheap labour if regulations are weak.

Free trade agreements and trading blocs

Groups of countries sometimes form agreements to reduce or eliminate trade barriers among themselves. You should be familiar with these terms:

• Free trade area - member countries remove tariffs and quotas on goods traded between themselves, but each country keeps its own external tariffs against non-members (e.g. NAFTA/USMCA)
• Customs union - like a free trade area, but members also adopt a common external tariff against non-members (e.g. the EU customs union)
• Common market - a customs union that also allows free movement of labour and capital between members

Foreign exchange rates

What determines the value of a currency?

Imagine you are travelling to the United States from the UK. You need to exchange your pounds for dollars. The exchange rate tells you how many dollars you will receive for each pound. But why does this rate change from one day to the next?

In a floating exchange rate system, the value of a currency is determined by demand and supply in the foreign exchange market, just like any other price.

Demand for a currency increases when:

• Foreigners want to buy the country's exports (they need the domestic currency to pay for them)
• Foreign investors want to invest in the country
• Speculators believe the currency will rise in value
• Interest rates in the country are high, attracting foreign savings ("hot money" flows)
• Tourists visit and exchange their own currency

Supply of a currency increases when:

• Domestic residents buy imports (they sell their own currency to obtain foreign currency)
• Domestic investors send money abroad
• Speculators sell the currency expecting it to fall
• Tourists from the country travel abroad and exchange their money

Effects of exchange rate changes

This is one of the most commonly tested areas in the section. You need to be able to trace the effects of a currency appreciation or depreciation on imports, exports, and the wider economy.

If a currency appreciates (rises in value):

• Exports become more expensive for foreign buyers, so export demand tends to fall
• Imports become cheaper for domestic consumers, so import demand tends to rise
• The trade balance may worsen (more imports, fewer exports)
• Domestic firms face greater competition from cheaper imports
• Inflation may fall because imported raw materials and consumer goods cost less

If a currency depreciates (falls in value):

• Exports become cheaper for foreign buyers, boosting export demand
• Imports become more expensive, discouraging import spending
• The trade balance may improve
• Inflation may rise because imported goods and raw materials cost more
• Domestic producers gain a competitive advantage over foreign rivals

Worked example: currency depreciation

Suppose the exchange rate changes from 1 GBP = 1.50 USD to 1 GBP = 1.20 USD. The pound has depreciated.

A British-made car that costs 20,000 GBP would previously have cost an American buyer 30,000 USD (20,000 x 1.50). After the depreciation, the same car costs only 24,000 USD (20,000 x 1.20). The car is now cheaper for American consumers, so demand for British exports is likely to increase.

Meanwhile, an American laptop priced at 1,200 USD would previously have cost a British buyer 800 GBP (1,200 / 1.50). After the depreciation, it costs 1,000 GBP (1,200 / 1.20). American imports are now more expensive for British consumers.

Fixed vs floating exchange rates

Current account of the balance of payments

What is the balance of payments?

The balance of payments is a record of all financial transactions between one country and the rest of the world over a period of time. For your IGCSE exam, you need to focus on the current account, which tracks four categories of transactions.

Components of the current account

Surplus and deficit

If a country's total inflows on the current account exceed its total outflows, it has a current account surplus. If outflows exceed inflows, it has a current account deficit.

A persistent deficit means the country is spending more on imports, services, and transfers than it is earning from exports and incoming investment income. This is not automatically a crisis, but it can signal underlying problems if it continues for a long period.

Causes of a current account deficit

• Overvalued exchange rate - makes exports expensive and imports cheap
• High domestic inflation - domestic goods become less competitive internationally
• Strong consumer demand for imports - rising incomes increase spending on foreign goods
• Decline in competitiveness - low productivity, outdated technology, or high production costs
• Dependence on imported raw materials - countries without natural resources must import them

Policies to correct a current account deficit

Governments have several tools available. Each comes with trade-offs, which is exactly what the examiner wants you to discuss.

1. Depreciation or devaluation of the currency - makes exports cheaper and imports more expensive. However, imported raw materials also become costlier, which can push up inflation.
2. Deflationary policies (reducing aggregate demand) - higher taxes or lower government spending reduce consumers' ability to buy imports. The downside is that this may cause unemployment and slow growth.
3. Tariffs and quotas - directly reduce imports, but risk retaliation and raise consumer prices.
4. Supply-side policies - improving education, infrastructure, and technology raises productivity and makes exports more competitive in the long run. These take time to have an effect.

Common mistakes students make in this section

1. Confusing appreciation and depreciation with revaluation and devaluation. Appreciation/depreciation happen in floating systems through market forces. Revaluation/devaluation happen in fixed systems through deliberate government action. Using the wrong term for the wrong system costs marks.
2. Forgetting to mention both sides when discussing protectionism. If a question asks you to "discuss whether tariffs benefit an economy," you must explain both the advantages (protecting jobs, raising revenue) and the disadvantages (higher consumer prices, possible retaliation). A one-sided answer cannot reach the top mark band.
3. Getting exchange rate calculations backwards. When the pound depreciates against the dollar, British exports become cheaper in dollar terms, not more expensive. Slow down, write out the multiplication, and check whether your answer makes logical sense.
4. Describing the current account as just "imports and exports." The current account has four components. Trade in goods is only one of them. Mentioning services, primary income, and secondary income demonstrates a fuller understanding.
5. Listing reasons for trade restrictions without explaining why each matters. "Protecting infant industries" is a reason, but the examiner wants the reasoning chain: infant industries have not yet achieved economies of scale, so they cannot compete on cost with established foreign firms, meaning temporary protection gives them time to grow and become efficient.

Self-check questions

Test yourself on these. Try writing your answers before checking against your textbook or notes.

1. Define specialisation by country and explain one basis for it.
2. Give two advantages and two disadvantages of free trade.
3. Explain the difference between a tariff and a quota. Which one raises government revenue?
4. The exchange rate changes from 1 EUR = 1.10 USD to 1 EUR = 1.30 USD. Has the euro appreciated or depreciated? Explain what this means for European exporters selling goods to the United States.
5. Name the four components of the current account of the balance of payments.
6. A country has a persistent current account deficit. Explain two policies the government could use to correct it, and evaluate one disadvantage of each policy.
7. "Globalisation benefits everyone equally." Do you agree? Justify your answer with reference to at least two different economic groups.