Free Rider Problem

The problem arises with goods that are non-excludable, meaning it is difficult to stop people who do not pay from using them. Public goods, such as national defence, street lighting and clean air, are classic examples.

For example, if a neighbourhood relied on voluntary payments to fund street lighting, many residents might choose not to pay, knowing they would still benefit if others paid. If enough people think this way, the lighting may never be funded.

The free rider problem explains why many public goods are funded through taxation, which requires everyone to contribute. It also appears in other situations: union members who benefit from negotiated pay rises without paying dues, shareholders who benefit from activist campaigns without contributing, and countries that benefit from others’ efforts to reduce carbon emissions without making their own.

Solutions include government provision funded by taxes, compulsory contributions, making goods excludable, for example through subscriptions, and social norms that encourage contribution.