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Similarity and polarization in groups

[working paper]

Baccara, Mariagiovanna
Yariv, Leeat

Corporate Editor
Wissenschaftszentrum Berlin für Sozialforschung gGmbH

Abstract

"The focus of this paper is the endogenous formation of peer groups. We study a model in which agents choose their peers prior to making decisions on multiple issues. Agents differ in how much they value the decision outcomes on one issue relative to another. While each individual can collect inform... view more

"The focus of this paper is the endogenous formation of peer groups. We study a model in which agents choose their peers prior to making decisions on multiple issues. Agents differ in how much they value the decision outcomes on one issue relative to another. While each individual can collect information on at most one issue, all information is shared within the group. Thus, the group's preference composition affects the type of information that gets collected. We characterize stable groups, groups that are optimal for all their members. When information costs are low, stable groups must be sufficiently homogeneous. Furthermore, stability requires more similarity among extremists than among moderate individuals. When information costs are substantial, a free rider problem arises, and makes extreme peers more desirable, as they are more willing to invest in information acquisition. We show that, as information costs grow, polarization appears and becomes increasingly pronounced in stable groups." (author's abstract)... view less

Keywords
behavior; group dynamics; decision; polarization; peer group; information capture; information; decision making; group; group formation

Classification
Basic Research, General Concepts and History of Economics
Sociology of Economics

Free Keywords
Homophily; Polarization; Group Formation; Information Collection; D82; D85

Document language
English

Publication Year
2010

City
Berlin

Page/Pages
55 p.

Series
Discussion Papers / Wissenschaftszentrum Berlin für Sozialforschung, Forschungsschwerpunkt Markt und Entscheidung, Abteilung Verhalten auf Märkten, 2010-20

Licence
Deposit Licence - No Redistribution, No Modifications

Data providerThis metadata entry was indexed by the Special Subject Collection Social Sciences, USB Cologne


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© 2007 - 2025 Social Science Open Access Repository (SSOAR).
Based on DSpace, Copyright (c) 2002-2022, DuraSpace. All rights reserved.