Dana L. Haynie (Ph.D. Pennsylvania State University, 1999) is Professor of Sociology and Director of the Criminal Justice Research Center. Her research examines adolescent violence/delinquency and peer networks including the diverse ways in which peer relationships and networks affect adolescent involvement in various types of problem outcomes. In addition, Dr. Haynie's research has focused on explaining the detrimental impact of adolescent residential mobility on problem behaviors. In recent work, she has explored the role of romantic partner influence on adolescent behavior, including a consideration of how romantic partners can provide a bridge to other peers and subsequently affect adolescent behavior. She is currently involved in a project that uses longitudinal friendship networks and SIENA analyses to evaluate the role of network processes for shaping adolescent risky sexual behavior. Dr. Haynie is also a faculty affiliate of the Initiative in Population Research at Ohio State. She serves on the editorial board of the journals American Sociological Review, Criminology, Journal of Youth and Adolescence and Journal of Crime and Justice.