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Effectiveness of the approval mechanism for CPR dilemmas: unanimity versus majority rule.

Abstract : We investigate the approval mechanism (AM) for a common pool resource (CPR) game with three players, underlining the role of unanimity and majority rules. The game involves two stages. In stage 1, players simultaneously and privately choose a proposed level of extraction from the CPR. In the second stage, they simultaneously decide whether to approve or disapprove others' choices. If the group approves, players' fi rst stage proposed extractions are implemented. Otherwise, a uniform extraction level, called disapproval benchmark (DB), is implemented onto each group member. We combine two approval rules, majority and unanimity, with two DBs, the minimum extraction level (MIN DB) and the Nash extraction level (NASH DB). These combinations offer four different treatments for testing the approval mechanism (AM). Our experimental findings show that the AM reduces signi cantly over-extraction in each treatment, and that the unanimity rule is more effective than the majority rule to lower extractions. The MIN DB reduces more group extractions than the NASH DB. Finally, only the MIN DB with unanimity implements the Pareto-effcient extraction level.
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Preprints, Working Papers, ...
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https://hal.inrae.fr/hal-03235539
Contributor : Laurent Garnier <>
Submitted on : Tuesday, May 25, 2021 - 6:51:28 PM
Last modification on : Tuesday, September 7, 2021 - 3:44:39 PM
Long-term archiving on: : Thursday, August 26, 2021 - 8:54:02 PM

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  • HAL Id : hal-03235539, version 1

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Koffi Serge William Yao, Emmanuelle Lavaine, Marc Willinger. Effectiveness of the approval mechanism for CPR dilemmas: unanimity versus majority rule.. 2021. ⟨hal-03235539⟩

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