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Endogenous timing and income inequality in the voluntary provision of public goods: Theory and experiment

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  • Jun‐ichi Itaya
  • Atsue Mizushima
  • Kengo Kurosaka

Abstract

This study theoretically and experimentally investigates the effects of income inequality on donors' decisions regarding timing choices and contributions to public goods when contribution timing is endogenously chosen by contributors. To this end, we use the conventional voluntary provision models of Warr (1983) and Bergstrom, Blume and Varian (1986), with Cobb–Douglas preferences augmented with a two‐stage game of Hamilton and Slutsky (1990). The following results were obtained and experimentally confirmed. First, when the distribution of income is extremely unequal, donors are indifferent between the simultaneous and sequential moves in the contribution game. Second, as income inequality is decreased, the simultaneous‐move contribution game is likely to emerge because every donor prefers to act as a leader. Nevertheless, a higher‐income donor may also prefer to act as a follower without specific social preferences and uncertainty regarding the quality of public goods. Third, most theoretical predictions regarding timing decisions are supported in our laboratory experiment, provided that the participants had enough time to learn the consequences of their timing choices. Moment endogène et inégalité salariale dans la prestation volontaire de biens publics : théorie et expérience. Cette étude enquête théoriquement et empiriquement sur les effets de l'inégalité salariale sur les décisions des donateurs en ce qui concerne le choix du moment et les contributions aux biens publics lorsque le moment de la contribution est choisi de façon endogène par les contributeurs. À cette fin, nous utilisons le modèle conventionnel de prestation volontaire Warr (1983), Bergstrom, Blume and Varian (1986), avec des préférences de Cobb–Douglas et complété par un jeu en deux étapes Hamilton and Slutsky (1990). Les résultats suivants ont été obtenus et confirmés de façon expérimentale. Premièrement, lorsque la distribution du salaire est extrêmement inégale, les donateurs sont indifférents entre les déplacements simultanés et séquentiels dans le jeu de contribution. Deuxièmement, au fur et À mesure que l'inégalité salariale diminue, il est probable que le jeu de contribution À déplacement simultané émerge puisque chaque donateur préfère agir À titre de chef de file. Néanmoins, un donateur ayant un revenu plus élevé pourrait également préférer agir comme un suiveur sans préférences sociales particulières ni incertitude concernant la qualité des biens publics. Troisièmement, la plupart des prédictions théoriques au sujet du moment des décisions sont étayées par notre expérience en laboratoire, tant que les participants ont suffisamment de temps pour comprendre les conséquences de leurs choix de moment.

Suggested Citation

  • Jun‐ichi Itaya & Atsue Mizushima & Kengo Kurosaka, 2023. "Endogenous timing and income inequality in the voluntary provision of public goods: Theory and experiment," Canadian Journal of Economics/Revue canadienne d'économique, John Wiley & Sons, vol. 56(4), pages 1347-1376, November.
  • Handle: RePEc:wly:canjec:v:56:y:2023:i:4:p:1347-1376
    DOI: 10.1111/caje.12677
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    References listed on IDEAS

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