This paper estimates peer influences on the alcohol, tobacco and cannabis use of a school based sample of UK 15 year olds. We present evidence of large, positive and statistically significant peer effects in all three behaviours when classmates are taken as the reference group. When friends are...

type="main" xml:id="obes12030-abs-0001" <title type="main">Abstract</title> <p>This article estimates peer influences on the alcohol, tobacco and cannabis use of UK adolescents. We present evidence of large, positive and statistically significant peer effects in all three behaviours when classmates are taken as the reference...</p>