4.5. Economic growth
- Syllabus
- 0455–2027–2028
- Topic
- 4.5
- Level
- —
Learning objectives
4.5.1Definition of economic growth• Definition of economic growth4.5.2Measurement of economic growth• real Gross Domestic Product (GDP)4.5.3Causes and consequences of economic growth• how economic growth may be caused by an increase in total demand, an increase in the quantity of resources or an increase in the quality of resources• advantages and disadvantages of economic growth4.5.4Causes and consequences of recession• definition of recession• how a recession may be caused by a decrease in total demand, a decrease in the quantity of resources or a decrease in the quality of resources• consequences of recession for consumers, workers, producers/firms and the government4.5.5Policies to promote economic growth• the range of policies available to promote economic growth and their effectiveness
Define economic growth
Economic growth is an increase in an economy's real output over time. It is normally described as a rise in real Gross Domestic Product (real GDP); an increase in productive capacity is potential economic growth.
Actual growth means more goods and services are produced now. Potential growth means the economy becomes capable of producing more, for example because the quantity or quality of resources improves. Potential growth can exist before all of the extra capacity is used.
A rise in nominal GDP caused only by higher prices is not economic growth. Nor is a rise in total demand by itself: demand must lead to a rise in real output for actual growth to occur.
Measure growth using real GDP
Real GDP measures the value of goods and services produced within an economy after removing the effect of price changes. Comparing real GDP across time therefore shows whether the volume of output has grown.
\text{economic growth rate}=\frac{\text{current real GDP}-\text{previous real GDP}}{\text{previous real GDP}}\times100%
If real GDP rises from 200billionto210 billion, the growth rate is (210−200)/200×100=5%. Output is 5% higher than in the previous period.
A smaller positive growth rate means output is still rising, but more slowly. A negative rate means real output has fallen. Do not use nominal GDP without adjusting for inflation, because higher prices can increase nominal GDP even when output does not rise.
Explain the causes and consequences of growth
Economic growth can come from stronger total demand or from greater productive capacity. The source of growth affects how sustainable it is and which benefits or costs appear.
| Cause | Causal route | Main condition |
|---|---|---|
| increase in total demand | firms respond to higher consumption, investment, government spending or net exports by raising output | spare capacity must exist; near full capacity, prices may rise instead |
| increase in quantity of resources | more labour, land, capital or enterprise allows more production | extra resources must be employable and productive |
| increase in quality of resources | education, training, healthcare, technology or better capital raises productivity | gains may take time and depend on effective use |
| Possible advantages | Possible disadvantages |
|---|---|
| more jobs, incomes, goods and services; higher living standards; more tax revenue for public services; possible reduction in poverty | demand-pull inflation; pollution and congestion; depletion of finite resources; unequal gains; structural unemployment if technology replaces labour |
Growth does not benefit everyone automatically. Judge it by its source, distribution, environmental cost, duration and whether higher real output per person translates into better living standards.
Trace recession causes and stakeholder effects
A recession is a period of falling real GDP, commonly identified when real GDP falls for two consecutive quarters. It is negative economic growth rather than merely a lower positive growth rate.
| Source of fall | Example mechanism |
|---|---|
| lower total demand | weaker consumption, investment, government spending or exports causes firms to cut output |
| lower quantity of resources | emigration, conflict or destruction of capital reduces what the economy can produce |
| lower quality of resources | weaker skills, productivity or technology lowers productive performance and competitiveness |
| Stakeholder | Likely consequence |
|---|---|
| consumers | lower income and purchasing power; reduced confidence and spending |
| workers | fewer vacancies, shorter hours, lower wages or unemployment |
| producers/firms | lower sales, profits, investment and survival rates |
| government | lower income/profit/spending-tax revenue and higher benefit spending, worsening the budget position |
These effects can reinforce one another: job losses reduce household spending → firms lose more sales → output and employment fall further. The size of the recession depends on its cause, duration and policy response.
Evaluate policies that promote economic growth
A government can promote actual growth by increasing total demand or promote potential growth by expanding productive capacity. The most effective policy depends on why growth is weak.
| Policy family | Growth route | Most likely to work when | Main limitation |
|---|---|---|---|
| fiscal: lower taxes or higher government spending | raises consumption, investment or public demand; useful infrastructure/education may also raise capacity | demand is weak and spare capacity exists | may create inflation, borrowing or opportunity cost; tax cuts may be saved |
| monetary: lower interest rates, greater money supply or a lower exchange rate | encourages borrowing, spending, investment or net exports | households/firms are responsive and confidence is adequate | weak confidence, debt or full capacity can reduce real-output gains |
| supply-side: skills, infrastructure, labour reform, incentives, deregulation or privatisation | raises resource quantity, quality, mobility, productivity or investment | weak capacity/productivity is the main constraint | long time lags, fiscal cost and implementation failure |
A balanced policy mix may support demand now and capacity later, but success is not measured by spending or announcements. Trace the policy to real GDP, then test spare capacity, confidence, time lag, inflation, government finances, external effects and environmental or distributional costs.