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How is economic growth measured through GDP, and what are the limits of GDP as a measure of living standards?

2.1 Measuring growth: real and nominal GDP, GDP per capita, index numbers and the rate of growth, the difference between actual and potential growth, and the limitations of GDP.

An OCR H460 answer to measuring economic growth, covering real and nominal GDP, GDP per capita, index numbers and growth rates, actual versus potential growth, and the limitations of GDP as a measure of living standards and welfare.

Generated by Claude Opus 4.811 min answer

Reviewed by: AI editorial process; not yet individually human-reviewed

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  1. What this dot point is asking
  2. Real and nominal GDP
  3. GDP per capita, index numbers and growth rates
  4. Actual versus potential growth
  5. The limitations of GDP
  6. Examples in context
  7. Try this

What this dot point is asking

OCR wants you to define and distinguish real and nominal GDP, to calculate GDP per capita and growth rates using index numbers, to distinguish actual from potential growth, and to evaluate the limitations of GDP as a measure of living standards. Index numbers and real-versus-nominal calculations are core quantitative skills.

Real and nominal GDP

Because nominal GDP is inflated by rising prices, it overstates growth. To convert nominal to real GDP, divide by a price index (the GDP deflator) and multiply by 100. This is why a country can have high nominal growth but low or negative real growth when inflation is high.

GDP per capita, index numbers and growth rates

Actual versus potential growth

The distinction matters because only potential growth raises the economy's long-run ceiling. An economy can grow rapidly by closing an output gap (actual growth) without expanding capacity; sustained rises in living standards need potential growth.

The limitations of GDP

GDP is widely used but is an incomplete measure of welfare:

  • It says nothing about distribution: an average can rise while most people are no better off.
  • It omits the informal (hidden) economy and unpaid work (household labour, volunteering).
  • It ignores negative externalities and resource depletion, so growth that pollutes still counts positively.
  • It misses quality changes and non-material aspects of well-being (leisure, health, security).

This is why economists supplement GDP with the Human Development Index (income, health and education) and measures of subjective well-being.

Examples in context

  • The cost-of-living squeeze. In 2022 to 2023 the UK saw positive nominal growth but, with high inflation, real GDP per capita stagnated or fell, hitting living standards.
  • The informal economy. In many developing economies, a large informal sector means official GDP understates true activity.
  • Green GDP debates. Proposals to adjust GDP for environmental damage reflect the limitation that standard GDP ignores resource depletion.

Try this

Q1. Distinguish between real and nominal GDP. [3 marks]

  • Cue. Nominal is at current prices (includes inflation); real is at constant prices (inflation removed).

Q2. Explain the difference between actual and potential economic growth. [4 marks]

  • Cue. Actual uses spare capacity (toward the PPF); potential raises capacity (outward shift of the PPF or LRAS).

Exam-style practice questions

Practice questions written in the style of OCR exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.

OCR H460/02 20194 marksNominal GDP rises from £2,000\pounds 2{,}000 billion to £2,142\pounds 2{,}142 billion over a year, while the GDP deflator (a price index) rises from 100 to 105. Calculate the rate of real GDP growth.
Show worked answer →

A short calculate question linking nominal and real values. Real GDP strips out price changes.

Real GDP in the second year (in base-year prices) =£2,142bn×100105=£2,040bn= \pounds 2{,}142\text{bn} \times \frac{100}{105} = \pounds 2{,}040\text{bn}.

Real growth =2,040−2,0002,000×100=2%= \frac{2{,}040 - 2{,}000}{2{,}000} \times 100 = 2\%. So nominal growth was 2,142−2,0002,000=7.1%\frac{2{,}142 - 2{,}000}{2{,}000} = 7.1\%, but with 5 per cent inflation real growth is about 2 per cent.

Markers reward deflating nominal GDP by the index, the real growth calculation, and the answer as a percentage. A common slip is to report nominal growth (7.1 per cent) as if it were real.

OCR H460/02 202112 marksAssess whether real GDP per capita is a good measure of living standards.
Show worked answer →

A levels-of-response question. Knowledge and application: define real GDP per capita (real output divided by population) and explain why it is used: it adjusts for inflation and population, allowing comparison over time and between countries, and tends to correlate with living standards.

Analysis: explain its usefulness as a broad indicator.

Evaluation: set out the limitations. It ignores distribution (an average can hide inequality), the informal economy, unpaid work, negative externalities and resource depletion, quality changes, and non-material well-being (leisure, health). Wider measures (HDI, well-being indices) capture more. Conclude that real GDP per capita is a useful but incomplete measure, best read alongside others.

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