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Edexcel IAL Economics · WEC12
Unit 2WEC12

Macroeconomic Performance & Policy
the big picture of the economy

Complete revision notes for Unit 2. Aggregate demand and supply, inflation, unemployment, economic growth and the policy toolkit — everything you need for WEC12.

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2.3.2 — Aggregate Demand
🔑 Key idea
AD = C + I + G + (X–M). Understanding what shifts each component is the key to macro analysis and policy evaluation.
Consumption — largest component; driven by income, confidence, interest rates.
The multiplier — an initial injection creates a larger final change in GDP.
AD shifts right
Output rises
Employment up
Inflation risk
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Everything in Unit 2, spec point by spec point

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Unit overview

What you need to know for WEC12

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AD/AS is your bread and butter
Almost every Unit 2 question can be answered with an AD/AS diagram. Master the shifts and you master the unit.
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The multiplier effect
Any injection into the circular flow creates a larger final change in national income. k = 1/(1–MPC) is a must-know formula.
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Policy trade-offs are everything
Examiners reward you for recognising that pursuing one objective (e.g. low unemployment) may conflict with another (e.g. low inflation).
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Short run vs long run
Distinguish demand-side effects (short-run, shifts AD) from supply-side effects (long-run, shifts LRAS) in every answer.
Exam paper info

WEC12 at a glance

Assessment details
Exam paperWEC12
Duration1 hour 30 minutes
Total marks80 marks
% of A-Level20%
Question types4820
Data responseYes — Section A
Essay questionsSection B — choose 1 of 2
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