Lewis’ research focuses on the formation and evolution of social networks and attempts to identify the underlying micromechanisms responsible for the generation of observed patterns. To do this, he has employed a number of large-scale datasets diverse in nature—from Facebook friendships among college students to messages sent among online dating site users to recruitment ties among online activists—and utilized recent advances in network modeling techniques for cross-sectional and longitudinal data. His work has been published in the American Journal of Sociology, the Proceedings of the National Academy of Sciences, Social Networks, Sociological Science, and the Journal of Computer-Mediated Communication. Personal webpage: http://www.kevinlewis-sociology.com