Why Do People Vote? The Paradox of Voting

Why economists puzzled over why people vote when one vote rarely decides an election, and the explanations from civic duty to social pressure.

From a narrow economic view, voting is puzzling. It takes time and effort, and the chance that one vote decides an election is tiny. So why do millions vote? This is the paradox of voting.

The calculation

Downs and later economists modelled voting as:

Benefit = probability your vote is decisive × value of your preferred outcome.
Cost = time and effort.

Since the probability is so small, the expected benefit is tiny, so rational self-interested people might not vote.

Explanations

Civic duty: many people feel voting is a responsibility.
Expressive voting: people vote to express identity or values, like cheering for a team.
Social pressure: friends, family and community expectations.
Group mobilisation: parties and groups encourage turnout, and group outcomes matter.
Close elections: turnout is often higher when races are close.

Evidence

A famous 2008 field experiment by Alan Gerber, Donald Green and Christopher Larimer in the US found that mailing people letters showing whether they and their neighbours had voted significantly increased turnout, showing the power of social pressure.

India’s high turnout

India’s turnout of around 65 percent in national elections is high for a large democracy. Rural and poorer voters often vote at high rates, partly because elections matter for welfare and local issues.

Why turnout matters

Higher turnout can make governments more representative and accountable.

The inked finger

Voters in India show their inked fingers on social media after voting. The visible ink and social sharing create a sense of pride and pressure that encourages others to vote.

Thinking voting is irrational

People vote for civic, expressive and social reasons that simple cost-benefit models miss.

Key takeaways

The paradox of voting asks why people vote when one vote rarely decides.
Civic duty, expression and social pressure explain turnout.
A 2008 experiment showed social pressure raised turnout.
India's national turnout is around 65 percent.