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Götte, Lorenz
Stutzer, Alois
Year of Publication: 
Series/Report no.: 
IZA Discussion Papers 3580
There is a longstanding concern that material incentives might undermine prosocial motivation, leading to a decrease in blood donations rather than an increase. This paper provides an empirical test of how material incentives affect blood donations in a large-scale field experiment spanning three months and involving more than 10,000 previous donors. We examine two types of incentive: a lottery ticket and a free cholesterol test. Lottery tickets significantly increase donations, in particular among less motivated donors. The cholesterol test leads to no discernable impact on usable blood donations. If anything, it creates a small negative selection effect in terms of donations that must be discarded.
Prosocial behavior
blood donations
material incentives : field experiment
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Working Paper

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