Teenage peer influence on drinking is no illusion

Ali M.M., Dwyer D.S. ‘Social network effects in alcohol consumption among adolescents’. Addictive Behaviors: 2010, 35, p. 337–342.

Is the peer influence on which many substance use prevention programmes are based an illusion due to other factors like pupils sharing similar environments or choosing like-minded friends? Not entirely, finds this unusually rigorous US analysis; the chances of a given child drinking rise by 4% for every 10% more of their school year-mates who drink.