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Preprints, Working Papers, ... (Working Paper) Year : 2015

"Facta non verba" : an experiment on pledging and giving

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This paper builds an experiment to investigate whether asking people to state how much they will donate to a charity (to pledge) can increase their actual donation. Individuals’ endowment is either certain or a random variable. We study different types of pledges, namely private, public and irrevocable ones, which differ in individual cost of not keeping a promise. Public pledges appear to be associated to lower donation levels. Irrevocable pledges ensure an amount of donations equal to donations in absence of pledges. Moreover, a significant number of individuals keep their promises, in presence of either private or public pledges. A higher risk attached to the endowment increases donations.
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Dates and versions

hal-02799567 , version 2 (03-07-2015)
hal-02799567 , version 1 (05-06-2020)


  • HAL Id : hal-02799567 , version 2
  • PRODINRA : 338629


Gilles G. Grolleau, Guillermo Mateu, Angela Sutan, Radu Vranceanu. "Facta non verba" : an experiment on pledging and giving. 2015. ⟨hal-02799567v2⟩
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