Understanding GDP & National Income
Deep dive into how GDP is calculated, what it measures, its limitations, and alternative indicators of economic well-being.
What is GDP?
Gross Domestic Product — definition, components, and why it matters.
Gross Domestic Product (GDP) is the most widely used measure of a country's economic output. It represents the total value of all goods and services produced within a country's borders in a given period.
Why GDP Matters
GDP tells us the size and health of an economy. When GDP grows, it generally means more jobs, higher incomes, and improved living standards. When it shrinks, the economy is in trouble.
The Three Approaches to GDP
GDP can be measured in three equivalent ways:
- Expenditure approach — Add up all spending: Consumption + Investment + Government Spending + Net Exports (C + I + G + NX)
- Income approach — Add up all income earned: wages + profits + rents + interest
- Production approach — Add up the value added at each stage of production
India's GDP
India's GDP is approximately $3.7 trillion (2024), making it the 5th largest economy globally. India uses the production approach with base year 2011-12.
"GDP measures everything except that which makes life worthwhile." — Robert F. Kennedy