Discussion Paper Details

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Title: Defaults and Donations: Evidence from a Field Experiment

Author(s): Steffen Altmann, Armin Falk, Paul Heidhues and Raji Jayaraman

Publication Date: December 2014

Keyword(s): charitable giving, default options, field experiment and online platforms

Programme Area(s): Public Economics

Abstract: We study how website defaults affect consumer behavior in the domain of charitable giving. In a field experiment that was conducted on a large platform for making charitable donations over the web, we exogenously vary the default options in two distinct choice dimensions. The first pertains to the primary donation decision, namely, how much to contribute to the charitable cause. The second relates to an "add-on" decision of how much to contribute to supporting the online platform itself. We find a strong impact of defaults on individual behavior: in each of our treatments, the modal positive contributions in both choice dimensions invariably correspond to the specified default amounts. Defaults, nevertheless, have no impact on aggregate donations. This is because defaults in the donation domain induce some people to donate more and others to donate less than they otherwise would have. In contrast, higher defaults in the secondary choice dimension unambiguously induce higher contributions to the online platform.

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Bibliographic Reference

Altmann, S, Falk, A, Heidhues, P and Jayaraman, R. 2014. 'Defaults and Donations: Evidence from a Field Experiment'. London, Centre for Economic Policy Research.