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Discussion Paper Details

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Title: Peer Effects and Social Networks in Education and Crime

Author(s): Antoni Calvó-Armengol, Eleonora Patacchini and Yves Zenou

Publication Date: September 2005

Keyword(s): centrality measure, delinquency, network structure, peer influence and school performance

Programme Area(s): Labour Economics and Public Economics

Abstract: This paper studies whether structural properties of friendship networks affect individual outcomes in education and crime. We first develop a model that shows that, at the Nash equilibrium, the outcome of each individual embedded in a network is proportional to her Bonacich centrality measure. This measure takes into account both direct and indirect friends of each individual but puts less weight on her distant friends. Using a very detailed dataset of adolescent friendship networks, we show that, after controlling for observable individual characteristics and unobservable network specific factors, the individual's position in a network (as measured by her Bonacich centrality) is a key determinant of her level of activity. A standard deviation increase in the Bonacich centrality increases the level of individual delinquency by 45% of one standard deviation and the pupil school performance by 34% of one standard deviation.

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Bibliographic Reference

Calvó-Armengol, A, Patacchini, E and Zenou, Y. 2005. 'Peer Effects and Social Networks in Education and Crime'. London, Centre for Economic Policy Research. https://cepr.org/active/publications/discussion_papers/dp.php?dpno=5244