Economic growth
Economic growth: build the core model, apply it to evidence and qualify conclusions where outcomes depend on context.
9708 section 4.4; AS Level. Checked against Cambridge's 2026–2028 Version 2 (latest version published December 2025) and 2029 Version 1 (published September 2026). Cambridge states that neither version has significant changes affecting teaching. Always follow the syllabus for the candidate's examination year.
Before you begin
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
Which measure removes the effect of changing prices when comparing output over time?
What you will learn
- Define and measure economic growth
- Distinguish nominal from real GDP growth
- Explain causes and consequences of growth
- Qualify comparisons using population and distribution
Core model and terms
Economic growth is an increase in real output over time, commonly measured by the percentage change in real GDP. Nominal GDP can rise because prices rise, so it does not by itself prove that the quantity of output increased. Real GDP adjusts for price changes; real GDP per person also accounts for population growth.
Apply and evaluate
Growth can result from stronger aggregate demand in the short run or a rise in productive capacity through labour, capital, skills, technology and productivity. It may increase incomes and employment, but effects on distribution, resource use, inflation and the environment depend on the source and pattern of growth.
Pause and explain
Which statement best applies economic growth?
Worked example
Nominal GDP rises from $800bn to $856bn while the GDP deflator rises by 4%. Approximate real growth using the percentage-change rule.
Show the worked solution
- Nominal growth = (856 − 800) ÷ 800 × 100 = 7%
- Approximate real growth = 7% − 4%
- Real GDP grows by about 3%
Answer Nominal growth = (856 − 800) ÷ 800 × 100 = 7% → Approximate real growth = 7% − 4% → Real GDP grows by about 3%
Try a topic test
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Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Nominal GDP rises from $800bn to $856bn while the GDP deflator rises by 4%. Approximate real growth using the percentage-change rule.
Give me a hint
Nominal growth is 7%; subtract the 4% rise in the price level as an approximation.
Compare my reasoning
- Nominal growth = (856 − 800) ÷ 800 × 100 = 7%
- Approximate real growth = 7% − 4%
- Real GDP grows by about 3%
Nominal growth = (856 − 800) ÷ 800 × 100 = 7% Approximate real growth = 7% − 4% Real GDP grows by about 3%
Look for these in your work
- Nominal growth = (856 − 800) ÷ 800 × 100 = 7%
- Approximate real growth = 7% − 4%
- Real GDP grows by about 3%
A country reports 5% nominal GDP growth and 6% inflation. What does this suggest about real GDP growth, approximately?
Give me a hint
Adjust the nominal rate for the rise in the general price level.
Compare my reasoning
- Nominal output rose 5%
- Prices rose 6%
- Approximate real growth is −1%, so real GDP fell slightly
Nominal output rose 5% Prices rose 6% Approximate real growth is −1%, so real GDP fell slightly
Look for these in your work
- Nominal output rose 5%
- Prices rose 6%
- Approximate real growth is −1%, so real GDP fell slightly
Explain how investment in worker training could contribute to growth over time.
Give me a hint
Link skills to productivity and productive capacity.
Compare my reasoning
- Training can raise human capital
- Workers may produce more or higher-value output per hour
- Potential output can increase as skills spread
Training can raise human capital Workers may produce more or higher-value output per hour Potential output can increase as skills spread
Look for these in your work
- Training can raise human capital
- Workers may produce more or higher-value output per hour
- Potential output can increase as skills spread
Real GDP rises, but population rises faster. Explain what may happen to real GDP per person.
Give me a hint
Compare the percentage growth rates.
Compare my reasoning
- Total real output increases
- Population increases at a faster rate
- Real output per person can fall despite aggregate growth
Total real output increases Population increases at a faster rate Real output per person can fall despite aggregate growth
Look for these in your work
- Total real output increases
- Population increases at a faster rate
- Real output per person can fall despite aggregate growth
Common mistakes
- Treating nominal GDP growth as real growth, or assuming a larger aggregate GDP means every person’s living standard rose.
What can you explain now?
Which measure removes the effect of changing prices when comparing output over time?
Compare with the explanation
Real GDP
Real GDP adjusts nominal output for price changes.
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Make it stick
Before moving on, explain the central idea in economic growth and state one condition that could change its effect.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.