Edexcel IAL Economics Revision Guide — All Four Units

How Each IAL Economics Paper Is Built

IAL Economics papers are not built like Business papers, and the difference matters for how you revise. Every unit is worth 80 marks, sat in the January, June or October series. Units 1 and 2 run for 1 hour 45 minutes and each count for 50% of the IAS and 25% of the full IAL; Units 3 and 4 run for 2 hours and each count for 50% of the IA2 and 25% of the IAL. Every paper opens with multiple choice — Business has none — and every paper is built around a source booklet.

The Source Booklet Is the Biggest Thing on the Paper

The five-part data question is worth 34 of the 80 marks in every unit — more than the essays, and more than multiple choice and short answers combined. It is the single highest-value thing to practise, and it is the part students most often leave until last because it cannot be revised by rereading notes. The data comes in a separate booklet: extracts, tables, charts and index numbers you have never seen, and the marks are for reading them accurately and then applying theory to what they actually show.

• Quote the data. A point that could have been made without the extract will not score application marks.
• Check the units before you calculate — the extracts mix levels, percentage changes and percentage point changes on purpose.
• Index numbers are not percentages. A rise from 100 to 120 is a 20% rise; a rise from 120 to 140 is not.
• Diagrams earn marks in data questions too, if they are labelled and the axes are right.

A Fifth of Every Paper Is Quantitative

The specification sets quantitative skills at a minimum of 20% of the marks across the qualification — twice the 10% required in IAL Business. That is roughly sixteen marks a paper that depend on arithmetic rather than argument, and they are the most reliably winnable marks available to you. Nine skills are named and assessed:

Unit 1: Markets in Action (WEC11)

Unit 1 is microeconomics: how prices are set and why markets go wrong. Six areas of content:

• Introductory concepts — scarcity, opportunity cost, production possibility frontiers
• Consumer behaviour and demand — demand, the elasticities, behavioural economics
• Supply — supply curves, elasticity of supply, costs of production
• Price determination — equilibrium, the price mechanism, consumer and producer surplus
• Market failure — externalities, public goods, information gaps
• Government intervention in markets — taxes, subsidies, price controls, and government failure

Unit 2: Macroeconomic Performance and Policy (WEC12)

Unit 2 is the macro half of the IAS, and shares Unit 1's paper structure exactly. Six areas of content:

• Measures of economic performance — growth, inflation, unemployment, the balance of payments
• Aggregate demand — the components of AD and what shifts them
• Aggregate supply — short-run and long-run AS, and the debate between them
• National income — the circular flow, injections and withdrawals, the multiplier
• Economic growth — causes, constraints, costs and benefits
• Macroeconomic objectives and policies — fiscal, monetary and supply-side policy, and the conflicts between objectives

Unit 3: Business Behaviour (WEC13)

Unit 3 moves to A2 and the paper changes shape: the short-answer section disappears, and you write two essays instead of one, chosen from three. Five areas of content — one fewer than the other units:

• Types and sizes of businesses
• Revenue, costs and profits
• Market structures and contestability
• Labour markets
• Government intervention

Unit 4: Developments in the Global Economy (WEC14)

Unit 4 has the same shape as Unit 3 — multiple choice, a source booklet and two essays from three — across six areas of content:

• Causes and effects of globalisation
• Trade and the global economy
• Balance of payments, exchange rates and international competitiveness
• Poverty and inequality
• The role of the state in the macroeconomy
• Growth and development in developing, emerging and developed economies

How to Revise Edexcel IAL Economics Effectively

The paper structure tells you how to split your time. Multiple choice and short answers reward recall, so definitions and diagrams need to be automatic. The source booklet and the essays reward judgement, which only improves by writing. Practise diagrams until you can draw and label them from memory in under a minute, then spend the bulk of your time on data questions and timed essay plans against past papers. Because the essays come from a choice, it pays to know which topics you answer well — but not to gamble on a narrow few.

Common Mistakes to Avoid

Most lost marks in IAL Economics come from habits rather than gaps in knowledge:

• Unlabelled or half-labelled diagrams — an axis without a label is a diagram without marks
• Confusing a percentage change with a percentage point change, which the data extracts set up deliberately
• Treating index numbers as percentages, or comparing two index series with different base years
• Writing about the data question without quoting the data, which forfeits the application marks
• One-sided essays — a 20-mark answer with no counter-argument cannot reach the top bands
• Spending essay time on the six multiple-choice marks, or leaving the 34-mark data question until the clock has gone