Drinking in a Face-to-Face Network in 2000

A sample of the largest component of friends, spouses, and siblings at examination 7 (centered on the year 2000); 1073 individuals are shown. Each node represents 1 person. The graph suggests clustering in abstention and heavy alcohol consumption behavior, both of which are confirmed by statistical models. For more details, see: N.A. Christakis and J.H. Fowler, “The Spread of Alcohol Consumption Behavior in a Large Social Network,” Annals of Internal Medicine 2010; 152: 426-433.