Definition of economic growth

Government and the Macroeconomy – Economic Growth

Definition of Economic Growth

Economic growth is the increase in the inflation‑adjusted market value of the goods and services produced by an economy over a period of time. It is usually measured by the growth rate of real Gross Domestic Product (real GDP).

Mathematically, the growth rate can be expressed as:

\$g = \frac{Yt - Y{t-1}}{Y_{t-1}} \times 100\%\$

where \$Yt\$ is real GDP in the current period and \$Y{t-1}\$ is real GDP in the previous period.

Analogy: The Growing Garden 🌱

Imagine an economy as a garden.

  • Seeds (capital, technology, skills) are planted.

  • Water and sunlight (investment, infrastructure, education) help the plants grow.

  • Over time, the garden becomes larger and produces more flowers (goods) and fruit (services).

When the garden yields more flowers and fruit than the previous year, we say the garden has grown. Similarly, when an economy produces more goods and services than before, it has experienced economic growth.

Real‑World Example 📈

YearReal GDP (in billions)Growth Rate
2023$1,000—
2024$1,0505 %

In this example, the economy grew by 5 % from 2023 to 2024.

Exam Tip 🧠

  • Always calculate growth using the real GDP figures to exclude inflation.

  • Remember the formula: \$g = \frac{Yt - Y{t-1}}{Y_{t-1}} \times 100\%\$.

  • When asked for “growth rate,” provide the percentage and explain that it reflects how much larger the economy has become.

  • Use the garden analogy to explain the concept in a clear, memorable way.