FEEM working papers "Note di lavoro" series
2013 .004

Games on Networks: Direct Complements and Indirect Substitutes


Authors: Sergio Currarini, Elena Fumagalli, Fabrizio Panebianco
Series: Climate Change and Sustainable Development
Editor: Carlo Carraro
Keywords: Networks, Peer Effects, Key-player, Centrality, Substitutes, Altruism
JEL n.: D01, D85

Abstract

Many types of economic and social activities involve significant behavioral complementarities (peer effects) with neighbors in the social network. The same activities often exert externalities that cumulate in "stocks" affecting agents' welfare and incentives. For instance, smoking is subject to peer effects, and the stock of passive smoke increases the marginal risks of bad health, decreasing the incentives to smoke. In the linear quadratic framework studied by Ballester et al. (2006), we consider contexts where agents' incentives decrease with the "stock" to which neighbors are exposed (agents may, for instance, care about their friends' health). In such contexts, the patterns of strategic interaction differ from the network of social relations, as agents display strategic substitution with distance-two neighbors. We show that behavior is predicted by a weighted Bonacich centrality index, with weights accounting for distance-two relations. We find that both maximal behavior and key-players tend to move to the periphery of the network, and we discuss the effect of close-knit communities and segregated groups on aggregate behavior. We finally discuss the implications for peer effects identification and for the emergence of potential biases in the estimation of social effects.

Download file
Download PDF file

FEEM Newsletter & Update

Subscribe to stay connected.

Your personal data will be processed by Fondazione Eni Enrico Mattei. – data Controller – with the aim of emailing the FEEM newsletter & Update. The use of Your email address is necessary for the implementation of the newsletter service. You are invited to read the Privacy Policy in order to obtain additional information about the protection of Your rights.

This Website uses technical cookies and cookie analytics, as well as “third party” profiling cookies.
If you close this banner or you decide to continue navigating on this Website, you express consent to the use of cookies. If you need additional information or you wish to express selective choices on the use of cookies, please refer to the   Cookie PolicyI agree