OCR A Level Economics: Economic growth, GDP and recession (H460)

This guide covers the growth part of the topic Economic growth and development in Component 2, Macroeconomics, of the OCR A Level Economics (H460) specification, Version 3.0 (June 2026), for first assessment in 2021. The specification labels no content as AS or extension: all of it is A Level. Economic development, alternative measures such as the Human Development Index, and international organisations are taught elsewhere. All data below are invented and illustrative.

Use it with the revision notes and the practice questions. See also the OCR Economics hub, the printable checklist and the free 10-minute diagnostics.

What this unit covers

Specification outcome	What you must be able to do
Structure of an economy	Explain primary, secondary and tertiary sectors
Growth, sustained and sustainable growth, recession	Explain each term
Real and nominal GDP	Explain, distinguish and compare changes over time
Why and how GDP is measured	Explain why; evaluate the difficulties
Calculations	Real and nominal growth rates; GDP per capita
Causes of growth	Evaluate in the short and long run; use a PPF/C and AD/AS
Costs and benefits of growth	Evaluate
Consequences of a recession	Evaluate
Growth, structure and sustainable development	Evaluate the relationship

The structure of an economy

The structure of an economy is the way its output and employment are divided between sectors.

• Primary: extracting or harvesting natural resources, such as farming, fishing and mining.
• Secondary: turning materials into goods, such as manufacturing, construction and power generation.
• Tertiary: services, such as retail, banking, teaching and transport.

A table of shares shows the structure. To compare shares, the table applies a GDP of 400 (billion units) to both years.

Sector	Share in 2000	Value	Share in 2024	Value
Primary	12%	48	6%	24
Secondary	28%	112	24%	96
Tertiary	60%	240	70%	280

Each year’s shares sum to 100. The shift towards tertiary output is typical as incomes rise, but not automatic: an economy rich in minerals may keep a large primary share.

Growth, sustained growth, sustainable growth and recession

Economic growth means an economy producing more over time, which is normally measured by how much real GDP changes in percentage terms. Actual output (what is produced now) and potential output (capacity) can each grow.

Sustained growth is growth that continues over a long period without being cut short by instability, such as high inflation or a balance of payments crisis. Sustainable growth is growth that can continue without damaging the environment or using up resources that future generations need. The policy objective asks for both. A mining boom may last twenty years (sustained) while depleting the deposits it relies on (not sustainable).

Sustainable development is commonly defined as development that satisfies today’s needs without reducing the ability of later generations to satisfy theirs.

A recession is a period of falling real output. A widely used rule is two quarters in a row in which real GDP falls. This is a convention: a long, mild decline is still a problem if one quarter shows a small rise.

Real and nominal GDP

Nominal (money) GDP values output at the prices ruling in the year of production (“current prices”). Real GDP is output valued at the prices of a fixed base year (“constant prices”), so the effect of changing prices is removed.

Nominal GDP can rise because more is produced, because prices rise, or both. Only real GDP shows whether more is being produced.

Measure	Formula
Real GDP	(nominal GDP / price index) x 100
Growth rate (%)	(new value - old value) / old value x 100
GDP per capita	GDP / population

Worked example 1: Country A (illustrative)

In 2023 (the base year, price index 100), nominal GDP is 400 billion. In 2024 nominal GDP is 430 billion and the price index is 105. Population rises from 20.0 million to 20.3 million.

1. Nominal growth = (430 - 400) / 400 x 100 = 7.5%.
2. Real GDP in 2024 = 430 / 105 x 100 = 409.52 billion (at 2023 prices).
3. Real growth = (409.52 - 400) / 400 x 100 = 2.38%.
4. Prices rose by 5%, which accounts for most of the gap between 7.5% and 2.38%.
5. Real GDP per capita, 2023 = 400 billion / 20.0 million = 20,000.
6. Real GDP per capita, 2024 = 409.52 billion / 20.3 million = 20,173.59.
7. Growth in real GDP per head = (20,173.59 - 20,000) / 20,000 x 100 = 0.87%.

Population grew by 1.5%, so real output per head rose far less than real output. Real GDP per capita is the better guide to average output per person, but says nothing about how output is shared.

Worked example 2: nominal up, real down

In Country D nominal GDP rises 4% while the price index rises 6%. Real growth = 1.04 / 1.06 - 1 = -1.89%. Real GDP has fallen even though the headline figure rose. Quoting nominal growth as “growth” is a classic error.

Compounding

Real GDP of 500 growing at 3% a year for five years: 500 x 1.03^5 = 579.64. Doubling at 3% takes ln 2 / ln 1.03 = about 23.4 years.

Why and how GDP is measured

GDP is the value of all final goods and services an economy produces in a period. It can be measured in principle by output (value added in each sector), income (wages, profits, rent and interest) or expenditure (consumption, investment, government spending and net exports). The three should agree.

Why measure it? To show whether output and living standards are rising, to compare countries and periods, to judge how close the economy is to capacity, to guide policy, and to put tax receipts and debt in proportion to the economy.

Evaluating the difficulties. Each point needs a direction (does GDP overstate or understate?) and a judgement of size.

• Informal and illegal activity. Cash-in-hand work and unreported production go unrecorded, so output is understated.
• Non-market output. Unpaid childcare, housework and volunteering produce value but are missing, so output is understated and comparisons across countries mislead if the share of unpaid work differs.
• Quality and new products. A product that costs the same as before but does far more is hard to capture, so real growth is probably understated.
• Externalities and “bads”. Spending on clearing pollution or repairing storm damage adds to GDP, but welfare has not risen. Environmental depletion is not subtracted.
• Price index accuracy. Real GDP depends on the deflator. If the index overstates inflation, real growth is understated.
• Comparing countries. Different currencies, exchange-rate swings and price levels distort comparisons. Data are revised and estimated, less reliably in poorer countries.
• Distribution. Average output tells you nothing about who gains.

Evaluation: GDP is useful for tracking change within one country using a consistent method. It is weaker as a measure of welfare or for comparing very different economies.

Causes of growth in the short and long run

Short run: growth is mainly a rise in actual output as aggregate demand increases and spare capacity is used. Causes include higher consumption (tax cuts, confidence, lower interest rates), higher investment, higher government spending, and higher net exports (for example a fall in the exchange rate or stronger world demand).

Long run: growth is a rise in potential output, a shift in the long-run aggregate supply (LRAS) curve or outward movement of the PPF/C. Causes include more capital (investment), better human capital (education and training), technological progress, more or better land and natural resources, a larger labour force (migration, higher participation), and better institutions and competition.

Diagram description: PPF/C

Label the axes capital goods (up) and consumer goods (across). A point inside the curve means unemployed resources, and moving out to the curve is short-run growth. A point on the curve is full capacity. Pushing the curve outwards, all round or along one axis only, is long-run growth.

Diagram description: AD/AS

Plot price level vertically and real output horizontally, then add AD, SRAS and a vertical LRAS at full-capacity output. A rightward shift of AD along a flat part of SRAS raises output with little price change (short-run growth into spare capacity). Near full capacity the same shift mostly raises prices. A rightward shift of LRAS (and usually SRAS) is long-run growth: a higher output at a given or lower price level.

Worked example 3: actual and potential growth

Country B has potential output of 500 and actual output of 470, so 30 of capacity is spare.

• Actual output rises to 490: short-run growth = (490 - 470) / 470 x 100 = 4.26%, using up spare capacity.
• Potential output then rises by 2.4% to 500 x 1.024 = 512: long-run growth, because capacity itself has expanded.
• Actual output of 490 can now rise by up to 22 before it reaches the new capacity, instead of 10.

Short-run growth cannot be repeated once capacity is reached; long-run growth sets the speed limit.

Evaluation: which cause dominates depends on spare capacity, time lags, and whether supply-side change targets the right bottleneck. Demand growth without supply growth risks inflation; supply-side policies are slow and uncertain.

Costs and benefits of growth

Benefits	Costs
Higher average living standards and a wider range of goods	Pollution and use of finite resources
More jobs, so lower unemployment	Widening inequality if gains go to few
Higher tax revenue funds health, education and infrastructure	Inflation and a deteriorating trade balance if demand outpaces capacity
Greater ability to reduce poverty	Congestion, stress and loss of leisure or community
Lower debt relative to GDP	Structural unemployment as industries decline

Evaluation: the answer depends on the speed and type of growth, who gains, and the timescale. Growth driven by clean technology has fewer costs than growth driven by extracting resources, and many costs are policy choices.

Consequences of a recession

Typical effects: rising unemployment (and later long-term unemployment, with skills loss), lower profits and business closures, lower tax revenue and higher welfare spending (so a larger budget deficit), reduced investment which also lowers future capacity, falling confidence, lower inflation or deflation, and greater hardship and poverty. Some effects are positive: weak demand cuts imports, and inefficient firms may close.

Worked example 4: spotting a recession

Real GDP index for Country C: quarter 1 = 100.0, quarter 2 = 99.2, quarter 3 = 98.5, quarter 4 = 98.9.

• Quarter 2: (99.2 - 100.0) / 100.0 = -0.8%.
• Quarter 3: (98.5 - 99.2) / 99.2 = -0.71%.
• Quarter 4: (98.9 - 98.5) / 98.5 = +0.41%.
• Two consecutive negative quarters (2 and 3) meet the usual definition. Peak to trough fall = (98.5 - 100.0) / 100.0 = -1.5%.
• Output in quarter 4 is still 1.1% below the peak.

Evaluation: severity depends on depth, length, cause (a demand collapse differs from a supply shock), the starting point, and whether automatic stabilisers and policy respond.

Growth, structural change and sustainable development

Growth often brings structural change: labour and capital move from primary activity into manufacturing and then services. This can raise productivity and living standards, but can leave regions and workers behind and, if growth rests on heavy industry, raise emissions.

Evaluate the relationship by asking:

1. What drives growth: resource extraction or productivity and technology?
2. Does the structure shift towards cleaner, less resource-intensive services, or does it simply move pollution abroad?
3. Is some of the extra income invested in education, infrastructure and clean capital that benefits future generations?
4. Is growth shared widely, so that needs are met now?

Growth can fund the technology and tax base for sustainable development, but nothing guarantees it. Growth that depletes resources undermines it, so policy matters either way.

Common errors

• Calling nominal GDP growth “growth” without removing price changes.
• Multiplying real GDP by the index instead of dividing nominal GDP by it.
• Taking real GDP per capita growth as equal to real GDP growth.
• Listing difficulties of measurement without saying whether GDP is over- or understated.
• Showing a long-run cause such as education as a shift of AD alone.

Official syllabus

This guide follows the OCR A Level in Economics (H460) specification, Version 3.0 (June 2026), for first assessment in 2021, published by OCR (Oxford Cambridge and RSA Examinations).