@TechReport{iza:izadps:dp3580,
            	author={Götte, Lorenz and Stutzer, Alois},
            	title={Blood Donations and Incentives: Evidence from a Field Experiment},
            	year={2008},
	month={Jul},
            	institution={Institute of Labor Economics (IZA)},
            	address={Bonn},
            	type={IZA Discussion Paper},
            	number={3580},
            	url={https://www.iza.org/index.php/publications/dp3580},
	abstract={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.},
	keywords={material incentives;blood donations;prosocial behavior;field experiment},
            }