Concept

Positive Consumption Externalities

A positive consumption externality occurs when an individual's consumption of a good or service confers a benefit on a third party. In this case, the social benefit of consumption is greater than the private benefit received by the consumer. Since consumers are not compensated for the external benefits they create, the market results in underconsumption of the good compared to the socially optimal level. Examples include the herd immunity generated by an individual's vaccination or the aesthetic pleasure a neighborhood receives from a well-maintained private garden.

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Updated 2026-05-02

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