Social Discounting and Distance Perceptions in Costly Altruism

Vekaria, K.M., Brethel-Haurwitz, K.M., Cardinale, E.M., Stoycos, S.A., & Marsh, A.A.

Altruistic kidney donors discount the value of helping socially distant others far less steeply than controls, suggesting that extraordinary altruism arises from an expanded circle of care rather than distorted perceptions of social closeness.