Business and Technology · Political and legal factors affecting business

Trading Blocs, Tariffs, Quotas and Globalisation for ACCA BT

Updated 11 October 2026 · Fact-checked

International trade is the buying and selling of goods and services across borders. Governments may restrict it with trade barriers such as tariffs (taxes on imports) and quotas (limits on quantity), or encourage it through trading blocs such as free trade areas and customs unions. Globalisation widens markets but adds legal and political risks.

Understand International Trade, Trading Blocs and Globalisation

International trade means selling goods and services to buyers in other countries (exports) and buying from them (imports). Countries trade because they differ in resources, skills and costs. A country gains by specialising in what it makes relatively well and trading for the rest. This idea is called comparative advantage.

Governments sometimes limit trade. This is protectionism. Common reasons are to protect domestic jobs, to shield new (infant) industries, to guard against dumping (selling abroad at unfairly low prices), to protect national security, or to improve the balance of payments. Protection has costs. Domestic consumers often pay higher prices, there is less choice, and other countries may retaliate.

The main trade barriers are:

Tariff: a tax on imported goods. It raises the import's price and earns the government revenue.
Quota: a limit on the quantity of a good that can be imported. It raises prices too, but the government earns no tax unless licences are sold.
Embargo: a total ban on trade with a country or in a product.
Subsidy: government support to domestic producers so they can undercut imports.
Non-tariff barriers: strict product standards, customs delays, paperwork and licensing rules.

A trading bloc is a group of countries that agree to reduce trade barriers between themselves. The levels of integration go from loose to deep:

Free trade area: members remove tariffs and quotas on trade with each other. Each member keeps its own tariffs on non-members.
Customs union: a free trade area plus a common external tariff on imports from non-members.
Common market: a customs union plus free movement of labour and capital.
Economic union: a common market plus common economic policies, often a shared currency.

Trading blocs help members through larger markets, economies of scale and cheaper imports. The downsides are trade diversion (buying from a less efficient member because outsiders face tariffs) and loss of national control over policy.

Globalisation is the growing integration of world markets, production and finance. For organisations it opens new customers, cheaper inputs and capital. It also brings intense competition, exchange rate risk, different legal systems, political instability, and pressure to follow ethical and tax rules in many countries. Firms must comply with local laws, and may face sanctions, nationalisation risk or sudden changes in tariffs.

Key formulas to remember

Tariff effect on price: Domestic price of import = world price + tariff; For a per-unit tariff add the amount. For a percentage tariff, price × (1 + rate).
Free trade area: Free trade area = no internal barriers; own external tariffs; Each member sets its own tariffs on non-members.
Customs union: Customs union = free trade area + common external tariff; This is the key difference from a free trade area.
Common market: Common market = customs union + free movement of labour and capital; Economic union adds common economic policies.

How to solve International Trade, Trading Blocs and Globalisation questions

Use this method for any objective test question on trade, blocs or globalisation.

1Read the question and decide what is tested: a barrier, a bloc type, or an effect of globalisation.
2Underline key words such as 'limit on quantity', 'tax', 'common external tariff' or 'free movement of labour'.
3Match the clue to the definition. Tax means tariff. Quantity limit means quota. Common external tariff means customs union.
4For bloc questions, rank the levels: free trade area, customs union, common market, economic union. Pick the lowest level that fits all the clues.
5For effect questions, decide who is affected (consumers, domestic producers, government, exporters) and whether the effect is a gain or cost.
6Check each option against the exact wording and remove those that are partly right.
7For number entry, apply the tariff to the world price and check the units and currency.

Quickest way: Clue-to-term matching

When to use it: Use this for definition and classification questions when time is short.

Tax on imports = tariff. Cap on units = quota. Total ban = embargo.
Only internal barriers removed = free trade area.
Common outside tariff added = customs union.
Free movement of people and capital added = common market.
Common currency or policies = economic union.
For effects: protection raises domestic prices and may trigger retaliation.

Common mistakes in International Trade, Trading Blocs and Globalisation

Saying a quota is a tax on imports.
Both tariffs and quotas raise import prices, so they get mixed up.
Fix: Remember a tariff is a price tool (a tax). A quota is a quantity tool (a limit).
Treating a free trade area and a customs union as the same.
Both remove barriers between members.
Fix: Look for the common external tariff. If members share one, it is a customs union. If each sets its own, it is a free trade area.
Assuming free trade areas allow free movement of workers.
Students blend the idea with the common market.
Fix: Free movement of labour and capital only starts at the common market level.
Saying protectionism always helps the domestic economy.
Students focus on protected jobs only.
Fix: Also state the costs: higher prices, less choice, inefficiency and retaliation.
Listing only benefits of globalisation.
Wider markets sound attractive.
Fix: Include risks too: competition, exchange rate risk, legal differences, political instability and ethical issues.

Worked examples

Example 1

A country imposes a 20% tariff on imported bicycles with a world price of $400 each. What is the domestic price of an imported bicycle, ignoring other costs?

Show the solution

The tariff is 20% of the world price.
Tariff = $400 × 20% = $80.
Domestic price = $400 + $80 = $480.

Answer: $480

Example 2

Three countries remove all tariffs and quotas on trade between themselves. Each keeps its own separate tariffs on imports from non-members. Which type of trading bloc is this: free trade area, customs union, common market or economic union?

Show the solution

Internal barriers are removed, so it is at least a free trade area.
A customs union needs a common external tariff. Here each country sets its own, so it is not a customs union.
There is no mention of free movement of labour or capital, so it is not a common market.
No common policies or currency are mentioned, so it is not an economic union.

Answer: Free trade area

Exam tips

Learn the four bloc levels as a ladder and test each option from the bottom up.
Tariff versus quota is a favourite pair. Think tax versus limit.
In multiple response questions, select exactly the stated number and avoid options that overstate, such as 'always' or 'never'.
For globalisation, link effects to legal and political factors such as differing laws, sanctions and instability.
For tariff number entry, apply the percentage to the world price, then add it.

Practice questions from Political and legal factors affecting business

International Trade, Trading Blocs and Globalisation in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

International Trade, Trading Blocs and Globalisation: frequently asked questions

What is the difference between tariffs and quotas?

A tariff is a tax on imports, which raises their price and earns the government revenue. A quota is a limit on the quantity that can be imported. Both protect domestic producers.

What is the difference between a free trade area and a customs union?

Both remove tariffs and quotas between members. A customs union also sets a common external tariff on non-members. In a free trade area, each member keeps its own.

How does globalisation affect businesses?

It gives access to larger markets, cheaper inputs and finance. It also brings stronger competition, exchange rate risk and the need to follow different laws and political conditions.

Why do governments use protectionism?

Common reasons are protecting jobs and infant industries, countering dumping, safeguarding national security and improving the balance of payments. It can raise prices and invite retaliation.