Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/107522
Authors: 
Bruhin, Adrian
Götte, Lorenz
Haenni, Simon
Jiang, Lingqing
Year of Publication: 
2014
Series/Report no.: 
IZA Discussion Papers 8738
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.
Subjects: 
social interaction
social ties
prosocial motivation
blood donation
bivariate probit
JEL: 
D03
C31
C36
Document Type: 
Working Paper

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