Non-rivalry
Definition. Non rivalry is the property of a good for which consumption by one person does not reduce the amount available for others, so additional consumers can be served at zero marginal cost. The good is not used up in consumption and can be enjoyed simultaneously by many people.
Because the marginal cost of supplying another user is zero, charging a price would inefficiently exclude consumers who value the good. Non rivalry is the second defining characteristic of a pure public good.
This term belongs to Public Goods in A Level Economics. Read the full chapter for the diagrams, worked examples and exam technique.
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