Conspiracy against the public - An experiment on collusion11“People of the same trade seldom meet together, even for merriment and diversion, but the conversation ends in a conspiracy against the public, or in some contrivance to raise prices.” (Adam Smith, (1776), pp. 111)

Åshild A. Johnsen and Ola Kvaløy

Journal of Behavioral and Experimental Economics (formerly The Journal of Socio-Economics), 2021, vol. 94, issue C

Abstract: We study to what extent collusive behavior is affected by the awareness of negative externalities. Theories of outcome-based social preferences suggest that negative externalities make collusion harder to sustain than predicted by standard economic theory, while sociological theories of social ties and intergroup comparisons suggest that bilateral cooperation can be strengthened if there exist outsiders that gain from cooperative break down. We investigate this in a laboratory experiment. Subjects play the infinitely repeated prisoner's dilemma with and without a negative externality. The externality is implemented by letting subjects make a positive contribution to a public good if they choose to deviate from cooperation between the two, i.e. cooperation is collusive since the gains are at the expense of the public. We find that this negative externality tends to increase collusive behavior. Initially, the level of cooperation is lower, but as subjects gain experience and observe that their partners choose to cooperate despite the negative externality, they cooperate as least as much as in the baseline treatment.

Keywords: Infinitely repeated prisoner's dilemma game; Negative externality; Cooperation; Collusion; Experiment (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:eee:soceco:v:94:y:2021:i:c:s2214804321000823

DOI: 10.1016/j.socec.2021.101742

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