Anti-rival good

An anti-rival good is one where the more people share it, the more utility each person receives. It is the opposite of a rival good. Examples include software and other information goods created through the process of commons-based peer production. The term was coined by economist Steven Weber.

An anti-rival good meets the test of a public good because it is non-excludable (freely available to all) and non-rival (consumption by one person does not reduce the amount available for others). However, it has the additional quality of being created by private individuals for common benefit without being motivated by pure altruism, because the individual contributor also receives benefits from the contributions of others.

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