๐”– Bobbio Scriptorium
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Controlling for the endogeneity of peer substance use on adolescent alcohol and tobacco use

โœ Scribed by Edward C. Norton; Richard C. Lindrooth; Susan T. Ennett


Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
101 KB
Volume
7
Category
Article
ISSN
1057-9230

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โœฆ Synopsis


This study examines whether the effects of peer substance use on adolescent alcohol and tobacco use are due to endogeneity of adolescents selecting their peer group. We analyzed data collected for a longitudinal analysis of a drug-use prevention programme for upper elementary school students. We used a two-step probit regression to control for the potentially endogenous explanatory variable peer substance use. Rigorous tests of endogeneity and the validity of the instrumental variables showed that controlling for the endogeneity of peer substance use to reduce bias is not worth the reduction in mean squared error in these data. Peer substance use has a positive and significant effect on adolescent substance use for both drinking and smoking. These results imply that peer influence is empirically more important than peer selection (endogeneity) in our sample of adolescents in grades 6-9. Living in a single-parent family was by far the strongest predictor of adolescent drinking and smoking.


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