Causes of growth — Edexcel A-Level Economics A
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Causes of growth explained
Economic growth is an increase in a country's real output over time, usually measured by the change in real GDP.
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Factors that could cause growth operate on the supply side and the demand side. Supply-side factors raise the productive capacity of the economy: more or better-quality factors of production, such as investment in capital goods, education and training, improved technology, and higher labour participation. Demand-side factors raise actual output when there is spare capacity: higher consumption, investment, government spending or net exports can increase AD and pull output up. Growth caused by more or better factors is often called potential growth, while growth caused by higher AD is actual growth. In multiple-choice questions, distinguish factors that shift LRAS from those that shift AD, and remember that sustainable long-run growth generally requires supply-side improvement.
Your focus
- Define economic growth and distinguish actual growth from potential growth.
- Identify and explain supply-side factors that could increase an economy's productive capacity.
- Identify and explain demand-side factors that could raise real output when spare capacity exists.
Causes of growth exam tips
Marking Points
- Define economic growth as an increase in real GDP or real national output over a period.
- Identify supply-side factors such as investment in physical capital, education and training, technological progress, and increased labour force participation.
- Identify demand-side factors such as rises in consumption, investment, government spending or net exports that increase AD.
- Distinguish between growth caused by an increase in productive capacity (LRAS shifting right) and growth caused by higher AD when spare capacity exists.
- Explain that supply-side factors raise potential output, while demand-side factors raise actual output in the short run.
- Recognise that the quality as well as the quantity of factors of production matters for growth.
Examiner Tips
- 💡In multiple-choice questions, classify each option as supply-side or demand-side before choosing.
- 💡Link each factor to the AD/AS diagram: supply-side factors shift LRAS right, demand-side factors shift AD right.
- 💡Use real-world examples such as infrastructure spending, apprenticeship schemes or new production technology to make answers concrete.
- 💡Check whether the question asks about actual growth or potential growth, as the correct factor may differ.
Common Mistakes
- Confusing a movement along the production possibility frontier with an outward shift of the frontier: only an increase in productive capacity shifts the frontier outwards.
- Treating higher AD as the only cause of growth: demand-side growth is limited by spare capacity and is not the same as long-run potential growth.
- Assuming all investment automatically causes growth: investment must be productive and matched by demand to raise output.
- Ignoring the role of technology and human capital: these are major supply-side drivers of long-run growth.