Leif Helland har publisert en fagartikkel med Stine Aakre og Jon Hovi i Journal of Conflict Resolution

Abstract

We study experimentally how enforcement influences public goods provision when subjects face two free-rider options that roughly parallel the nonparticipation and noncompliance options available for countries in relation to multilateral environmental agreements (MEAs). Our results add to the MEA literature in two ways. First, they suggest that compliance enforcement will fail to enhance compliance in the absence of participation enforcement. Second, they indicate that compliance enforcement will boost compliance significantly in the presence of participation enforcement. Our results also add to the experimental literature on public goods provision, again in two ways. First, they reveal that previous experimental findings of enforcement boosting cooperation are valid only in settings with forced (or enforced) participation. Second, they show that subjects’ willingness to allocate costly punishment points is significantly stronger when the enforcement system permits punishment of both types of free riding than when it permits punishment of only one type.

Aakre, S., Helland, L., & Hovi, J. (2016). When does informal enforcement work? Journal of Conflict Resolution, 60(7), 1312-1340

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