Economic Integration: IB Economics 4.4 notes

What economic integration means

Economic integration is the process of countries reducing or removing barriers between their economies and coordinating policy, moving from loose trade deals toward deep political and monetary union. It reflects the key concept of interdependence: as integration deepens, members' economies become more tied together.

The IB sequence is a ladder of increasing depth: preferential trade agreement, free trade area, customs union, common market, and monetary (economic) union. Each rung removes more barriers and requires more shared policy, and each brings both benefits (larger markets, more trade) and costs (lost policy independence).

The stages of integration

A preferential trade agreement (PTA) gives member countries lower barriers on some goods than they charge outsiders; it is the shallowest form. A free trade area (FTA) removes tariffs and quotas on trade between members, but each member keeps its own external tariff on non-members (NAFTA, now USMCA, and ASEAN's free trade area are examples).

A customs union goes further: members remove internal barriers and also adopt a common external tariff, so they negotiate as a bloc (Mercosur is one). A common market adds free movement of factors of production, labour and capital, across borders (the EU single market). A monetary union adds a single shared currency and a single monetary policy set by one central bank.

Monetary union: the euro as a case study

In a monetary union members share one currency and one central bank. The euro area, launched in 1999 with the European Central Bank setting a single interest rate, is the leading example. The benefits are real: no exchange-rate risk or currency-conversion costs on intra-bloc trade, price transparency across borders, and lower transaction costs that encourage trade and investment.

The costs are equally real. Members give up independent monetary policy and their own exchange rate, so a country in recession cannot cut its own interest rate or let its currency depreciate to regain competitiveness. The euro-area sovereign debt crisis after 2010, when Greece could not devalue and needed bailouts, is the standard illustration of this loss of adjustment tools.

Benefits and costs of integration

Benefits include a larger market that lets firms exploit economies of scale, stronger competition that lowers prices and raises efficiency, more foreign investment, and greater political cooperation and stability. Free movement of labour and capital in deeper unions improves resource allocation.

Costs include the loss of sovereignty over trade, and in monetary unions over monetary and exchange-rate policy; the risk that structurally weaker members struggle without their own adjustment tools; and the danger that a bloc's common external tariff diverts trade away from cheaper non-members. Integration is therefore a trade-off, not an unqualified good.

Trade creation vs trade diversion (HL)

When a customs union forms, its net welfare effect depends on two opposing forces. Trade creation occurs when a member switches from buying a good it produced expensively at home to buying it from a lower-cost member now that the internal tariff is gone; this raises efficiency and welfare.

Trade diversion occurs when a member switches from a lower-cost outside supplier to a higher-cost member supplier, simply because the outsider now faces the common external tariff while the member does not. This lowers efficiency and welfare. A customs union improves welfare on balance only if trade creation outweighs trade diversion, which is why the height of the external tariff and the cost differences between members and outsiders matter.

The WTO: functions and criticisms

The World Trade Organization, founded in 1995 as the successor to GATT, oversees the global trading system. Its functions are to administer multilateral trade agreements, provide a forum for negotiating further liberalisation (trade rounds), settle disputes between members through a binding dispute-settlement system, and review members' trade policies. It works on the principle of non-discrimination (the most-favoured-nation rule).

Criticisms are well rehearsed and exam-worthy: negotiations move slowly and the Doha round stalled for years; critics argue the rules favour developed economies and large agricultural exporters over developing countries; environmental and labour standards receive little weight; and the dispute-settlement system has itself faced paralysis when members block the appointment of judges. The WTO is central but contested.

How this is examined

• Get the ladder exactly right and in order (PTA, free trade area, customs union, common market, monetary union); the defining difference between a free trade area and a customs union (common external tariff) is a frequent short-answer mark.
• HL Paper 3 and Paper 2 may ask for trade creation vs trade diversion; define both and state the welfare rule that a customs union only raises welfare if creation exceeds diversion.
• Use the euro area as the monetary-union case study and name the specific trade-off: members lose independent monetary policy and the exchange rate as adjustment tools.
• For WTO questions, give both functions (dispute settlement, negotiation, policy review) and at least two concrete criticisms (developing-country bias, stalled Doha round) for balance.

Key terms

free tradeglobalizationcomparative advantageprotectionismspecialization