GDP and welfare

The essentials

A higher GDP is often taken to mean that people are better off. This is only partly true. GDP measures the money value of final goods and services produced, but welfare means the overall well-being of people. Several reasons make GDP an imperfect index of welfare.

Key points

• Distribution of GDP: if GDP rises but the extra income goes mostly to a few rich people, the welfare of most people may not improve or may even fall.
• Non-monetary exchanges: many activities are not marketed and so are not counted, for example domestic work done by family members, or barter in rural areas. GDP therefore underestimates true activity and well-being.
• Externalities: benefits or harms an activity causes to others without payment. A factory that pollutes a river reduces welfare, but the cost of pollution is not deducted from GDP (negative externality). A well-kept public garden raises welfare without being fully counted (positive externality).
• Composition of output: GDP may rise because more weapons or harmful goods are produced, which may not raise welfare.
• Per capita GDP is a better guide than total GDP when population is growing, but it still hides distribution.

Exam tips

Learn the three main limitations named in standard textbooks: distribution, non-monetary exchanges and externalities, with one example each. Case-type questions describe a situation and ask which limitation it illustrates.

Common mistakes

• Saying GDP ignores all services; it includes marketed services such as banking and transport.
• Confusing a positive externality with a subsidy; an externality involves no payment at all.