 Choosing peers: Homophily and polarization in groupsMariagiovanna Baccara and Leeat Yariv Journal of Economic Theory, 2016, vol. 165, issue C, 152-178 Abstract: This paper studies the formation of peer groups entailing the joint production of public goods. In our model agents choose their peers and have to pay a connection cost for each member added to the group. After groups are formed, each agent selects a public project to make a costly contribution to, and all members of the group experience the benefits of these contributions. Since agents differ in how much they value one project relative to the other, the group's preferences affect the generated profile of public goods. We characterize mutually optimal groups, groups that are optimal for all their members. When contribution costs are low relative to connection costs, mutually optimal groups must be sufficiently homogeneous. As contribution costs increase relative to connection costs, agents desire more connections, which in turn raises the risk of free riding. Extreme peers are then more appealing, since they are more willing to contribute, and polarization arises. Keywords: Homophily; Peer groups; Mutually optimal groups; Public goods; Tiebout (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:jetheo:v:165:y:2016:i:c:p:152-178 DOI: 10.1016/j.jet.2016.04.005 Access Statistics for this article Journal of Economic Theory is currently edited by A. Lizzeri and K. Shell More articles in Journal of Economic Theory from Elsevier |
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