HookThe metal box that made your trainers cheap
On 26 April 1956, a converted oil tanker called the Ideal X sailed from Newark to Houston carrying 58 metal boxes. Its owner, an American trucker named Malcom McLean, had worked out that the expensive part of shipping was not the sea voyage — it was the armies of dockers hand-loading loose cargo at each end. On the economist Marc Levinson's estimates, loading loose cargo cost around $5.86 a ton; craning McLean's standardised containers aboard cost roughly $0.16. A cost cut of about 97%, from one idea about a box.
The container is why distance stopped mattering. Today Felixstowe alone handles roughly four million containers a year — close to half of Britain's container trade — and shipping a pair of trainers from Vietnam to Southampton adds pennies to their price. Section 2.4 is the map of the world the box built: what globalisation actually is and what drove it, how to tell a developed economy from an emerging one, why nations trade at all, and what the price of the pound does to everyone standing in the chain.
MechanismGlobalisation — the forces that shrank the world
Globalisation is the growing interdependence of economies through flows of goods and services, capital, people and ideas. It has causes you should be able to list and, better, explain. Falling transport costs — containerisation above all. Falling trade barriers — under GATT (1947) and its successor the WTO (1995), average tariffs on manufactured goods fell from over 20% after the war to under 5% today. The communications revolution — undersea fibre and the internet let a firm in Leeds manage a supplier in Shenzhen in real time. And the rise of multinational corporations slicing production across borders through foreign direct investment: an iPhone is designed in California and assembled in China from parts made in a dozen countries.
The result is measurable: world trade has risen from roughly a quarter of world GDP in 1970 to well over half today. For UK firms the consequences cut both ways — vastly bigger markets and cheaper inputs, but competition from anywhere. British clothing manufacturing largely moved offshore within a generation; British services (finance, law, design, education) found the whole world buying. Every 2.4 answer should hold both edges of that blade.
ModelDeveloped, emerging, developing — three speeds of world economy
Economies are classified mainly by income per head and by broader measures like the Human Development Index, which combines income, education and life expectancy. Developed economies — the UK, Germany, Japan — have high incomes per head and are dominated by services (around four-fifths of UK output). Emerging economies are industrialising fast and growing fast: China, India, Brazil — the 'BRIC' label was coined in 2001 by Goldman Sachs economist Jim O'Neill precisely to flag where growth would live. Developing economies — Ethiopia or Malawi, say — have low incomes per head and large agricultural sectors.
The classifications matter to firms because emerging economies are where tomorrow's customers are being minted. The World Bank credits China's post-1978 reforms with lifting roughly 800 million people out of extreme poverty — the fastest mass enrichment in history, and the reason luxury brands from Burberry to Jaguar Land Rover built their growth strategies around Chinese demand. For an Edexcel B data question, the operative skill is reading which stage an economy is at from its numbers: income per head, growth rate, sector shares.
China's economy is worth roughly $18 trillion; the UK's roughly $3.3 trillion. So China's economy is more than five times bigger. But China has about 1.4 billion people to Britain's 68 million, so income per head is roughly $13,000 against roughly $49,000 — about a quarter of the UK's. Both facts are true at once: China is simultaneously the world's second-largest economy and a middle-income country. Which number you quote depends on the question — total GDP for market size, GDP per head for living standards. Confusing the two is one of the most reliable ways to lose application marks.
MechanismInternational trade — why Britain buys and sells
Trade is specialisation — the 1.2.4 idea — scaled up to countries. Nations concentrate on what they produce relatively well and trade for the rest, and the gains arrive as lower prices, wider choice, and access to markets far larger than home. Scotch whisky is the clean example: exports of roughly £5.6bn in 2023 across more than 160 markets. A Speyside distillery selling only to Britain would be a fraction of its size — exporting lets it reap economies of scale no domestic market could fund.
Imports are not the villain in this story, whatever the political rhetoric. They hand consumers choice and lower prices, and they hand firms cheaper inputs — the productivity and unit-cost logic of 2.3 often runs through an imported machine or component. Import competition also disciplines domestic prices, which links straight back to the competition ideas in 2.2.
Britain's trade profile has a shape worth memorising: a persistent deficit in goods, offset by one of the world's largest surpluses in services — the UK is consistently among the top two or three services exporters on earth. When an extract shows you a UK trade balance, expect exactly that split, and name it.
ModelExchange rates — the price of the pound, and who it punishes
An exchange rate is simply the price of one currency in terms of another. When the pound buys more dollars it has appreciated; fewer, depreciated. The mnemonic is SPICED — Strong Pound: Imports Cheap, Exports Dear — but the marks come from the mechanism, not the acronym: a stronger pound makes UK goods pricier abroad and foreign goods cheaper here, so exporters suffer and importers celebrate. A weaker pound reverses every sign.
Britain ran the live experiment on the night of 23–24 June 2016. As the referendum result emerged, the pound fell from around $1.50 to about $1.33 within hours — its biggest one-day fall of the floating-rate era — and drifted near $1.22 by that autumn. Exporters' order books swelled; importers' costs jumped. By October 2016 Unilever was demanding roughly 10% more from supermarkets to cover pricier imported ingredients, and Tesco briefly pulled Marmite and other Unilever brands from its website in protest — 'Marmite-gate', the depreciation made visible on the shelf. Dearer imports feeding through to prices is also your bridge to inflation in 2.5.
Take the pound from $1.50 to $1.25 — close to the referendum-to-autumn path, rounded for clean arithmetic (the actual autumn rate was nearer $1.22). A £40,000 British-built car used to cost an American buyer £40,000 × 1.50 = $60,000; now £40,000 × 1.25 = $50,000 — 16.7% cheaper, without the exporter touching its price list. Meanwhile a $15,000 invoice for imported components used to cost $15,000 ÷ 1.50 = £10,000; now $15,000 ÷ 1.25 = £12,000 — a 20% cost rise. Same 16.7% depreciation, different percentage effects in each direction — and the multiply-for-exports, divide-for-imports decision is exactly what the calculation questions test.
VocabularyKey terms the mark scheme pays for
TrapsMisconceptions that cost marks
ExamWhat examiners want
Exchange rate calculations are the banker marks of 2.4, and the whole skill is the multiply-or-divide decision: converting a sterling price into foreign currency, multiply by the rate; converting a foreign-currency cost into pounds, divide. Write the formula, substitute, state the direction of change and the percentage. Examiners repeatedly report candidates who know SPICED but cannot execute the arithmetic — do both.
On the 8- and 12-markers, run an agent-by-agent scan rather than a vague 'good for the economy': exporter, importer, consumer, worker, government — at least two gainers and two losers from any exchange rate move or globalisation trend. Anchor application in a named, dated case (the 2016 depreciation and Marmite-gate carry an answer a long way). And in development questions, check whether the data is total GDP or GDP per head before you write a word — the distinction is usually the point of the question.