Essential definitions

Economic integration

Agreements that reduce barriers between economies and may coordinate economic policies.

Trading bloc

A group of economies granting one another preferential trading conditions.

Policy independence

The ability to choose national policy without a shared commitment restricting it.

Cooperation changes trading opportunities

Economic integration is closer cooperation between economies through reduced barriers and shared rules. Suppose two neighbours remove tariffs on each other's products. Firms can reach a larger market and buyers may obtain cheaper goods. Producers also face stronger competition from their partner's firms.

Specialisation, scale economies and new investment can raise productivity. At the same time, a less competitive domestic firm may lose customers, leaving workers to find new jobs. Integration changes opportunities; practical access, qualifications, finance and mobility influence who can use them.

Read what members have agreed

A free trade area removes internal barriers while members keep their own tariffs on outsiders. A customs union also adopts a common external tariff. A common market goes further by allowing factors of production, including labour and capital, to move more freely.

Sharing a currency is a separate, deeper commitment. It removes exchange costs between members but changes how interest rates and adjustment are managed. These arrangements do not require every agreement to follow the same path or share every national policy.

Follow benefits and constraints

An agreement can favour members while leaving barriers against non-members. That distinction matters: removing a tariff only for members gives them preferential treatment. Buyers may pay less yet switch from a lower-cost non-member to a higher-cost member. HL lessons separate trade creation from trade diversion and then assess monetary union.

First, the next lesson compares trading arrangements and the freedom members give up. A separate lesson explains the World Trade Organization's role in broader rules. Throughout, compare the particular agreement's benefits with transition costs, outside relationships and loss of policy choice. Membership alone does not settle whether every resident becomes better off.

Apply and evaluate

• Assess the specific commitments in an agreement rather than treating all blocs as identical.