Economic Growth

GDP = total monetary value of all goods and services produced within a country in a given period.

Two measures:

Nominal GDP. At current prices. Includes inflation. Overstates true growth.

Real GDP. Adjusted for inflation. Shows actual changes in output. Use this for growth comparisons.

Worked example. Country A's nominal GDP rises from $1,000bn to$1,080bn. Inflation was 5%. Real growth = nominal growth − inflation ≈ 8% − 5% = 3%.

Annual growth rate:

$\text{Growth rate} = \dfrac{\text{Real GDP}_{new} - \text{Real GDP}_{old}}{\text{Real GDP}_{old}} \times 100$

Per-capita growth. Real GDP per person — accounts for population growth. Per-capita is what matters for living standards.

Recession. Two consecutive quarters of NEGATIVE real GDP growth. (UK, US definitions.)

Cambridge tip. Mark schemes for "define growth" expect REAL GDP, not nominal. Memorise the distinction.

Growth comes from RAISING productive capacity. Four main routes:

1. More quantity of resources.

• Population growth → more labour.
• Discovery of natural resources → more land.
• Investment in capital → more factories, machines.
• Immigration → more labour.

2. Better quality of resources.

• Education and training → higher labour productivity.
• Better healthcare → workers more productive.
• Better technology → more output per machine.

3. Investment in physical capital. Specifically: factories, infrastructure, communication networks. Often financed by domestic saving or foreign direct investment (FDI).

4. Innovation and R&D. New products, processes, business models. The basis of long-run growth in advanced economies.

5. International trade. Specialisation according to comparative advantage; importing capital and technology; exporting to wider markets.

6. Sound institutions. Property rights, contract enforcement, low corruption, stable political system. Without these, the other factors don't deliver growth.

Cambridge tip. Top-band answers identify multiple causes AND give country examples. e.g., 'Singapore's growth was driven by FDI in manufacturing and education investment'.

Benefits:

• Higher living standards. More goods and services per person.
• Lower poverty. Average incomes rise; more resources for redistribution.
• More employment. Growing economies create more jobs.
• Higher tax revenue. Government can fund public services.
• Improved infrastructure. Growth funds investment in roads, schools, hospitals.

Costs:

• Environmental damage. Higher production → more emissions, more resource use, climate change.
• Inequality. Growth often raises top incomes faster than median incomes.
• Resource depletion. Non-renewable resources (oil, minerals) used up.
• Inflation. If growth outstrips capacity → demand-pull inflation.
• Cultural / social change. Rapid growth disrupts established ways of life.
• Boom-bust risk. Periods of fast growth often followed by recessions.

The sustainability question. Can growth continue indefinitely on a finite planet? Increasingly economists distinguish 'green growth' (decoupling from emissions) from traditional growth.

Cambridge tip. Mark schemes for evaluation expect BOTH benefits and costs. Top-band answers consider sustainability and intergenerational issues.