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Conditional cooperation and group size: experimental evidence from a public good game

Author

Listed:
  • Tianyi Li

    (University of Arizona)

  • Charles N. Noussair

    (University of Arizona)

Abstract

Conditional cooperation is the tendency to cooperate if and only if others do so as well. It is the most common behavior in social dilemmas. We study how the incidence of conditional cooperation in the public goods game, the most widely studied social dilemma in experimental economics, varies with group size. In a laboratory experiment, we apply the strategy method to elicit how participants’ willingness to contribute to a public good depends on other group members’ decisions. A within-subject design allows us to evaluate and compare an individual participant's contribution behavior in different-sized groups. Two main findings emerge. First, the share of players who are conditional cooperators is consistent across group sizes. Second, the strategies chosen imply that conditional cooperators hold a (correct) belief that others are more cooperative in a larger than in a smaller group.

Suggested Citation

  • Tianyi Li & Charles N. Noussair, 2024. "Conditional cooperation and group size: experimental evidence from a public good game," Journal of the Economic Science Association, Springer;Economic Science Association, vol. 10(1), pages 98-112, June.
  • Handle: RePEc:spr:jesaex:v:10:y:2024:i:1:d:10.1007_s40881-023-00152-4
    DOI: 10.1007/s40881-023-00152-4
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    References listed on IDEAS

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    More about this item

    Keywords

    Conditional cooperation; Public goods; Strategy method; Group size;
    All these keywords.

    JEL classification:

    • C9 - Mathematical and Quantitative Methods - - Design of Experiments
    • H41 - Public Economics - - Publicly Provided Goods - - - Public Goods

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