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The Review of Economics and Statistics Vol. 95 No. 4 2013

Peer Effects and Multiple Equilibria in the Risky Behavior of Friends

David Card1; Laura Giuliano2

1 University of California, Berkeley and NBER · 2 University of Miami

open access

Abstract

We study social interactions in the initiation of sex and other risky behaviors by best friend pairs in the Add Health panel. Focusing on friends with minimal experience at the baseline interview, we estimate bivariate ordered-choice models that include both peer effects and unobserved heterogeneity. We find significant peer effects in sexual initiation: the likelihood of initiating intercourse within a year increases by almost 5 percentage points (on an 11% base rate) if one's friend also initiates intercourse. Similar effects are present for smoking, marijuana use, and truancy. We find larger effects for females and important asymmetries in nonreciprocated friendships.

DOI
10.1162/rest_a_00340
Volume
95
Issue
4
Pages
1130-1149
Language
en
Sources
openalex crossref

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