References: High school dating: Data drawn from Peter S. Bearman, James Moody, and Katherine Stovel, Chains of affection: The structure of adolescent romantic and sexual networks, American Journal of Sociology 110, 44-91 (2004). (The image, however, was made by myself and isn't published anywhere else except on this page.) Web site, physicist collaborations, Les Miserables: M. E. J. Newman and M.