Bruhin, Adrian Götte, Lorenz Haenni, Simon Jiang, Lingqing
Year of Publication:
IZA Discussion Papers 8738
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.
social interaction social ties prosocial motivation blood donation bivariate probit