Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/116674
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Type: Journal article
Title: A model of informal favor exchange on networks
Author: Masson, V.
Choi, S.
Moore, A.
Oak, M.
Citation: Journal of Public Economic Theory, 2018; 20(5):639-656
Publisher: Wiley Online Library
Issue Date: 2018
ISSN: 1097-3923
1467-9779
Statement of
Responsibility: 
V. Masson, S. Choi, A. Moore, M. Oak
Abstract: We develop a model of informal favor exchange within a social network where the cost of providing a favor is stochastic. The community has a norm, which specifies a cost threshold under which one should perform a favor if asked, as well as a punishment—exclusion from the network of the “noncompliers,” that is, of those who do not perform favors despite their cost being below the threshold, and those who refuse to punish nonperformers. We show that there always exists a cost threshold such that all agents participating in the favor exchange system receive strictly positive expected utility, and the system is a stable system. For systems involving stars and regular networks, we provide an ordering of the highest cost threshold supporting their stability. We also identify the conditions under which systems are efficient and show that, among all efficient systems, the one with the complete network provides the highest sum of expected utilities. An efficient system, however, need not be stable.
Rights: © 2018 Wiley Periodicals, Inc.
RMID: 0030096484
DOI: 10.1111/jpet.12306
Appears in Collections:Economics publications

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