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Can people form links to efficiently access information?

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Caria, Stefano and Fafchamps, Marcel (2020) Can people form links to efficiently access information? Economic Journal, 130 (631). pp. 1966-1994. doi:10.1093/ej/ueaa064 ISSN 0013-0133.

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Official URL: https://doi.org/10.1093/ej/ueaa064

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Abstract

We investigate how individuals form social connections to access information. In our link formation game of one-way-flows, the myopic best response is to link to the node with the highest informational reach, which depends on indirect links. This strategy leads to the efficient circle network. We find that myopic best response predicts the links that subjects form. However, some subjects target high-degree nodes instead, neglecting indirect connections. This reduces network efficiency. We obtain similar findings when subjects link to transfer information to others. Using a minimal group treatment, we also find evidence of in-group homophily in link formation.

Item Type: Journal Article
Subjects: H Social Sciences > HB Economic Theory
H Social Sciences > HM Sociology
Divisions: Faculty of Social Sciences > Economics
Library of Congress Subject Headings (LCSH): Economics -- Sociological aspects, Business networks -- Mathematical models, Social networks -- Mathematical models, Game theory, Social groups -- Mathematical models, Network analysis (Planning)
Journal or Publication Title: Economic Journal
Publisher: Oxford University Press
ISSN: 0013-0133
Official Date: October 2020
Dates:
DateEvent
October 2020Published
20 May 2020Available
26 May 2020Accepted
Volume: 130
Number: 631
Page Range: pp. 1966-1994
DOI: 10.1093/ej/ueaa064
Status: Peer Reviewed
Publication Status: Published
Reuse Statement (publisher, data, author rights): This is a pre-copyedited, author-produced version of an article accepted for publication in Economic Journal following peer review. The version of record A Stefano Caria, Marcel Fafchamps, Can People Form Links to Efficiently Access Information?, The Economic Journal, , ueaa064 is available online at: https://doi.org/10.1093/ej/ueaa064
Access rights to Published version: Restricted or Subscription Access
Copyright Holders: © 2020 Royal Economic Society. Published by Oxford University Press
Date of first compliant deposit: 26 May 2020
Date of first compliant Open Access: 20 May 2022
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIED[ESRC] Economic and Social Research Councilhttp://dx.doi.org/10.13039/501100000269
UNSPECIFIEDDepartment for International Developmenthttp://dx.doi.org/10.13039/501100000278
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