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Stated preference methods

Stated preference methods monetise social value by drawing on what people say they would pay for a service or outcome. These also try to estimate what non-users might value, whether through ‘altruistic use’ (knowing someone else might like it); ‘option use’ (having the opportunity to do something); ‘bequest use (leaving something for the future), and ‘existence use’ (satisfaction that things exist even if you don’t enjoy them personally).