"But he can't be a man 'cause he doesn't smoke The same cigarettes as me." -- Rolling Stones, (I Can't Get No) Satisfaction

An article in this week's New England Journal of Medicine illuminates the social dynamics of smoking and quitting, and generated a lot of attention in the media.  The study followed twelve thousand people, many of whom were initially smokers, from 1971 until 2003.  The large group was all connected in one large social network, meaning ...