Heterogeneity in peer effects for binary outcomes

Mathieu Lambotte ()
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Mathieu Lambotte: CREM - Centre de recherche en économie et management - UNICAEN - Université de Caen Normandie - NU - Normandie Université - UR - Université de Rennes - CNRS - Centre National de la Recherche Scientifique

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Abstract: I introduce heterogeneity into the analysis of peer effects arising from conformity by allowing peer-effect parameters to vary across agents' actions. Using a structural model based on a simultaneous network game with incomplete information, I derive conditions that guarantee the uniqueness of the equilibrium and the identification of heterogeneous peer-effect parameters. Applying the model to data on smoking and alcohol consumption among secondary school students, and conducting policy simulations, I show that assuming a homogeneous preference for conformity leads to biased estimates of peer effects and ex ante policy evaluations.

Keywords: Econometrics (econ.EM); FOS: Economics and business (search for similar items in EconPapers)
Date: 2026-09-12
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Persistent link: https://EconPapers.repec.org/RePEc:hal:wpaper:hal-05747827

DOI: 10.48550/arXiv.2511.15891

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