Anonymity, Reciprocity, And Conformity: Evidence From Voluntary Contributions To A National Park In Costa Rica

Alpizar, Francisco; Carlsson, Fredrik; Johansson-Stenman, Olof, (2008). Anonymity, Reciprocity, And Conformity: Evidence From Voluntary Contributions To A National Park In Costa Rica. Journal Of Public Economics, 92, 5-6, 1047–1060.

Keywords:

Discipline:

Type of evidence: Field-exp-charity

Related tools: Reveal previous donations

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Charity target:

Donor population:

Paper summary

“We have interviewed tourists from many different countries and one of the most common donations has been 2/5/10 US dollars.” [Or no statement]

Impact of 'previous' primed contribution:

  • $2 prime: most likely to donate, significant
  • $10 prime: largest contribution, conditional on contributing
    • Net effect is not clearly statistically significant


Discussion


Evaluation


Meta-analysis data

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Citations: 111

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Verified:

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Mean donation:

SD donation:

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Endowment description:

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Effect size original:

Effect size USD:

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