Gross Domestic Product (GDP)

Gross Domestic Product, commonly abbreviated as GDP, is an economic measure that quantifies the market value of all final goods and services produced within a country's borders over a specific period, typically a quarter or a year. The term "final" excludes intermediate goods that are incorporated into other products, preventing double-counting.

GDP is used to track economic growth, compare the economies of different countries, and inform decisions on monetary and fiscal policy. It is calculated by national statistical agencies, which follow the System of National Accounts framework established by international bodies.

Three methods of calculation

The production method sums the value added across different sectors such as agriculture, manufacturing, and services. The expenditure method combines household consumption, investment, government spending, and the balance of trade (exports minus imports). The income method sums wages of workers, corporate profits, rents, and other income components. When calculated correctly, all three methods should yield the same result.

Nominal and real GDP

Nominal GDP is measured in current market prices and can rise even if output does not change, due to price inflation. Real GDP adjusts for changes in price levels using a base year, showing the growth in actual output. When comparing different countries, purchasing power parity (PPP) is also used to account for differences in price levels.

GDP per capita

GDP per capita is GDP divided by population. It serves as a rough indicator of living standards, but it does not show how wealth is distributed among the population, nor does it distinguish between income going to nationals and income going to foreign investors.

Limitations and critiques

GDP does not account for non-market activities such as housework and unpaid care, nor does it deduct for environmental damage and depletion of natural resources. Additionally, the informal economy, which is substantial in many countries, is only partially captured. For these reasons, alternative measures have been proposed to evaluate social progress and environmental sustainability.