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We present evidence from a natural field experiment involving nearly 100,000 individuals on the effects of offering economic incentives for blood donations. Subjects who were offered economic rewards to donate blood were more likely to donate, and more so the higher the value of the rewards. They were also more likely to attract others to donate, spatially(More)
We conducted a natural field experiment with the American Red Cross to study the effects of economic incentives on pro-social behavior. The experiment was designed to assess the total effects of incentives on prosocial behavior including local and short-term effects, but also spatial and temporal substitution, heterogeneity and social spillovers. Subjects(More)
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