Global Economy and Trade

Global Economy and Trade

🟢 Lite — Quick Review (1h–1d)

Rapid summary for last-minute revision before your exam.

Global Economy and Trade describes the cross-border flow of goods, services, capital, and labour, governed by institutions created at the 1944 Bretton Woods Conference — chiefly the IMF, the World Bank, and later the WTO (1995, succeeding GATT 1947).

Two ideas carry most of the weightage. Comparative Advantage (David Ricardo, 1817) says a country should specialise in what it produces at the lower opportunity cost, not necessarily at lower absolute cost — this is the theoretical case for free trade and the opposite of protectionism (tariffs, quotas, subsidies, anti-dumping duties). The Balance of Payments (BoP) records every cross-border transaction: Current Account = Balance of Trade + Net Income from Abroad + Net Current Transfers, and overall BoP must balance once the Capital + Financial Accounts and a balancing item are included.

LAT high-yield picks: know WTO’s Most-Favoured-Nation (MFN) and GSP principles, the difference between a trade deficit (Imports > Exports) and a trade surplus, and the formula Terms of Trade = (Export Price Index / Import Price Index) × 100.

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🟡 Standard — Regular Study (2d–2mo)

Standard content for students with a few days to months.

Core Definitions

The global economy is the integrated system of production, finance, and consumption linking national markets. Trade is the visible arm of this system; Foreign Direct Investment (FDI) and portfolio flows are its capital arm. Exchange rates translate currencies and influence competitiveness; the Real Effective Exchange Rate (REER) adjusts the nominal rate for relative price levels across trading partners.

BoP Architecture

The Balance of Payments has two principal components. The Current Account records goods, services, primary income (interest, dividends) and secondary income (remittances, aid). The Capital Account captures capital transfers and acquisition/disposal of non-produced, non-financial assets. The Financial Account captures FDI, portfolio investment, and reserve changes. The identity — BoP = Current + Capital + Financial + Balancing Item — must sum to zero after accounting for statistical discrepancies.

Comparative vs Absolute Advantage

Absolute advantage (Adam Smith) exists when one producer uses fewer inputs than another. Comparative advantage (Ricardo) exists when opportunity cost is lower, and it is the logically rigorous justification for specialisation. Two countries always gain from trade even if one is absolutely more efficient in both goods.

WTO Principles

The WTO operates on four principles: non-discrimination (MFN and National Treatment), reciprocity, transparency (notifications), and binding tariffs (committed ceilings). The Generalised System of Preferences (GSP) lets developed members grant lower tariffs to developing-country exports without extending MFN rates to all WTO members.

Protectionist Instruments

Governments restrict trade through tariffs (import duties), quotas (quantity limits), subsidies (domestic support), anti-dumping duties (levied when exports are priced below normal value), and non-tariff barriers (standards, licensing). Dumping is exports below domestic price or below cost; the WTO’s Anti-Dumping Agreement permits remedial duties after an investigation.

Regional Trade Blocs

Regional Trade Agreements (RTAs) — EU, USMCA (formerly NAFTA), ASEAN, RCEP, SAARC, ECOWAS — reduce barriers among members while keeping external tariffs. RTAs are permitted under GATT Article XXIV despite the MFN principle.

Exam Patterns for LAT

Questions test (i) identification of the correct institution to a function (IMF → BoP assistance; World Bank → development finance; WTO → trade rules), (ii) application of comparative advantage to a numerical payoff table, and (iii) interpretation of terms-of-trade and J-curve effect statements.

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🔴 Extended — Deep Study (3mo+)

Comprehensive coverage for students on a longer study timeline.

Edge Cases and Subtleties

The J-curve effect explains why a currency depreciation can initially worsen the trade balance before improving it — import volumes adjust slowly while import prices rise immediately, so the bill value spikes before quantities reallocate. The Marshall–Lerner condition (sum of export and import demand elasticities > 1) specifies when depreciation will eventually correct the deficit.

Special Drawing Rights (SDRs) are IMF-issued reserve assets, valued on a basket of USD, EUR, CNY, JPY, and GBP since 2022. SDRs are allocated to member states to supplement official reserves, not traded directly as currency.

Links to Adjacent Topics

Trade intersects with environmental law (carbon border adjustments, e.g. the EU’s CBAM), labour standards (ILO-linked provisions in USMCA), and intellectual property (TRIPS Agreement, 1994). Dispute settlement at the WTO operates through the Dispute Settlement Body (DSB) and the Appellate Body — note that the Appellate Body has been non-functional since December 2019 due to blockages in appellate member appointments, a recurring LAT factual question.

Common Mistakes

Candidates frequently (a) confuse comparative with absolute advantage, (b) treat the WTO as a UN organ (it is autonomous), (c) assume a trade deficit is inherently bad (it can be financed by stable capital inflows), and (d) ignore that MFN rates are ceilings, not the rates actually charged.

Worked Micro-Example

Suppose Country A produces 1 cloth or 2 wine per labour-hour; Country B produces 1 cloth or 1 wine per labour-hour. Both have absolute advantage in cloth? No — only A. But comparative advantage: A’s opportunity cost of cloth = ½ wine; B’s opportunity cost of cloth = 1 wine. A should specialise in cloth, B in wine — both gain through trade.

Practice Prompts

1. A country’s exports price index rises 10% while import prices rise 4%. Calculate the percentage change in Terms of Trade and interpret who gains.
2. Explain why a tariff under the MFN principle must be extended to all WTO members, with one exception permitted by GATT Article XXIV.

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