WJEC A Level Economics
WJEC A Level Economics Macroeconomic Theory Exam Questions
Free WJEC A Level Economics revision for Macroeconomic Theory: what you need to know, common mistakes and exam-style questions with answers. Covers the circular flow, aggregate demand, AD/AS analysis, SRAS, Keynesian and Neo-Classical LRAS and the Phillips curves.
Practise Macroeconomic Theory with past papers
Once you have learnt this topic, find the Macroeconomic Theory questions in real WJEC A Level Economics past papers and mark them with the mark scheme. Doing lots of real questions is the quickest way to learn how examiners ask about each idea.
About WJEC A Level Economics Macroeconomic Theory
Macroeconomic theory runs through both halves of the WJEC course. At AS you learn the circular flow of income, the components of aggregate demand, the AD and AS functions and how to use AD/AS analysis to explain changes in real output and the price level. At A2 you extend this with short run aggregate supply, the Keynesian and Neo-Classical views of long run aggregate supply, and the short run and long run Phillips curves, including the natural rate of unemployment (NAIRU). These models are the toolkit for every macroeconomic objective and policy. Examiners look for clearly labelled diagrams and an understanding that outcomes depend on spare capacity and expectations.
What you need to know
- Circular flow In the circular flow, households supply factors of production and firms pay incomes, so income, output and expenditure are equal. Injections (I, G, X) add to the flow and withdrawals (S, T, M) leak from it; equilibrium is where they are equal. Changes in injections have a multiplier effect.
- Aggregate demand AD = C + I + G + (X - M). Consumption depends on income, interest rates, wealth, confidence and credit; investment on interest rates, expected profits and the accelerator; net exports on the exchange rate and incomes abroad.
- AD/AS analysis AD slopes down; AS slopes up in the short run. A shift in AD changes output and the price level in the same direction; a shift in SRAS moves them in opposite directions. The effect of an AD shift depends on how close the economy is to capacity.
- SRAS (A2) SRAS shows output at different price levels when some input costs, such as wages, are fixed. It shifts when costs of production change, for example wage rates, oil prices, taxes on firms and import prices. The monetarist view stresses that SRAS shifts as wages adjust to expected inflation.
- LRAS (A2) The Neo-Classical LRAS is vertical at full employment, so the economy self corrects and AD only affects prices in the long run. The Keynesian LRAS is horizontal at low output, then curves upward and becomes vertical, so the economy can stay below full employment.
- Phillips curves (A2) The short run Phillips curve shows a trade-off between inflation and unemployment, which has been observed in the UK. The Neo-Classical long run Phillips curve is vertical at the natural rate; keeping unemployment below it causes accelerating inflation. Supply side changes can shift the long run curve.
Common mistakes in Macroeconomic Theory
- Including savings or taxes as injections. Injections are investment, government spending and exports; savings, taxes and imports are withdrawals.
- Drawing AD/AS without labelling the axes as Price level and Real output.
- Claiming an AD increase always raises output. On a Neo-Classical LRAS the long run effect is only on the price level.
- Mixing up SRPC and LRPC shifts. Changes in expected inflation shift the SRPC; supply side changes shift the LRPC.
- Forgetting to compare Keynesian and Neo-Classical views when asked to evaluate. The answer often depends on which model you assume.
Try three Macroeconomic Theory exam-style questions
1. State two injections into the circular flow of income. (2 marks)
Show the mark scheme answer
Any two from: investment; government spending; exports.
2. Using an AD/AS diagram, explain the effect of a fall in consumer confidence on the economy. (4 marks)
Show the mark scheme answer
Consumers spend less and save more; consumption falls so AD shifts left; real output falls and the price level falls (or rises more slowly); unemployment rises; correct diagram.
3. Explain how the Keynesian and Neo-Classical views differ on the effect of an increase in AD. (6 marks)
Show the mark scheme answer
Keynesian: with spare capacity the AS curve is flat, so higher AD raises real output and employment with little inflation; near full capacity it mainly raises prices; Neo-Classical: LRAS is vertical at full employment, so in the long run higher AD only raises the price level; any short run output gain disappears as wages adjust; diagrams for each view.
Macroeconomic Theory FAQs
What does WJEC A Level Economics Macroeconomic Theory cover?
It covers the circular flow of income, aggregate demand and its components, the AD and AS functions and AD/AS analysis at AS, then SRAS, Keynesian and Neo-Classical LRAS and the short and long run Phillips curves at A2.
Which unit is Macroeconomic Theory examined in?
The AS parts are examined in AS Units 1 and 2, and the A2 parts in A2 Units 3 and 4. Unit 4 assesses all A level content.
How should I learn the Phillips curve?
Start with the short run trade-off, then explain step by step how expectations shift the SRPC up when unemployment is held below the natural rate. Practise drawing both curves and labelling the natural rate (NAIRU).
