%0 Report
        %A Bruhin, Adrian
%A Götte, Lorenz
%A Haenni, Simon
%A Jiang, Lingqing
        %T Spillovers of Prosocial Motivation: Evidence from an Intervention Study on Blood Donors
        %D 2014
        %8 2014 Dec
        %I Institute of Labor Economics (IZA)
        %C Bonn
        %7 IZA Discussion Paper
        %N 8738
        %U https://www.iza.org/index.php/publications/dp8738
        %X 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.
        %K bivariate probit
%K blood donation
%K prosocial motivation
%K social ties
%K social interaction