@TechReport{iza:izadps:dp8738,
            	author={Bruhin, Adrian and Götte, Lorenz and Haenni, Simon and Jiang, Lingqing},
            	title={Spillovers of Prosocial Motivation: Evidence from an Intervention Study on Blood Donors},
            	year={2014},
	month={Dec},
            	institution={Institute of Labor Economics (IZA)},
            	address={Bonn},
            	type={IZA Discussion Paper},
            	number={8738},
            	url={https://www.iza.org/index.php/publications/dp8738},
	abstract={Spillovers of prosocial motivation are crucial for the formation of social capital. They facilitate interactions among individuals and create social multipliers that amplify the effects of policy interventions. We conducted a large-scale intervention study among dyads of blood donors to investigate whether social ties lead to motivational spillovers in the decision to donate. The intervention is a randomized phone call making donors aware of a current shortage of their blood type and serving us as an instrument for identifying motivational spillovers. About 40% of a donor's motivation spills over to the other donor, creating a significant social multiplier of 1.78.},
	keywords={bivariate probit;blood donation;prosocial motivation;social ties;social interaction},
            }