Rolf Loeber, Ph.D., is Distinguished University Professor of Psychiatry, and Professor of Psychology, and Epidemiology at the University of Pittsburgh, Pittsburgh, Pennsylvania. He is the initiator of two large longitudinal studies, the Pittsburgh Youth Study, and the Pittsburgh Girls Study. He has published widely in the fields of juvenile antisocial behavior and delinquency, substance use, and mental health problems. He ... Read moreis an elected member of the Koninklijke Academie van Wetenschappen (Royal Academy of Sciences) in the Netherlands, and the Royal Irish Academy in Ireland. He is fellow of the American Society of Criminology and the American Psychological Association. Wesley G. Jennings, Ph.D, is Associate Professor, Associate Chair, and Undergraduate Director in the Department of Criminology, has a Courtesy Appointment in the Department of Mental Health Law and Policy, and is a Faculty Affiliate of the Florida Mental Health Institute in the College of Behavioraland Community Sciences at the University of South Florida. In addition, he also has a Courtesy Appointment in the Department of Health Outcomes & Policy and is a Faculty Affiliate of the Institute for Child Health Policy in the College of Medicine at the University of Florida. He received his doctorate degree in criminology from the University of Florida. He has over 200 publications, his h-index is 32 (i-index of 88), and he has over 3,500 citations to his published work. He is the author of two recently published, academic press books with Springer: Offending from childhood to late middle age: Recent results from the Cambridge Study in Delinquent Development (with David Farrington & Alex Piquero) and Offending from childhood to young adulthood: Recent results from the Pittsburgh Youth Study (with Rolf Loeber, Dustin Pardini, Alex Piquero, and David Farrington). In addition, he is the author (with Jennifer Reingle) of Criminological and Criminal Justice Research Methods, andan author (with Ronald Akers & Christine Sellers) of the 7th edition of Criminological Theories: Introduction, Evaluation, and Application.  Lia Ahonen, Ph.D. studied at Örebro University, Sweden and is currently a Visiting Research Fellow at the Department of Psychiatry, University of Pittsburgh, PA, USA, and Assistant Professor in Criminology at Örebro University, Sweden. She is the former department chair of the Psychology Department, Örebro University, Sweden. Her research interests are juvenile delinquency and serious antisocial behavior, serious and lethal violence, mental health problems, gun violence and policy, juvenile justice organizations, corrections and general justice related policy issues. After her graduation Dr. Ahonen has received three grants to pursue post-doctoral research on longitudinal data from the Pittsburgh Girls study and the Pittsburgh Youth Study. Dr. Ahonen received the Early Career Award, American Society of Criminology, Division of Developmental and Life Course Criminology. Alex R. Piquero, Ph.D., is the Ashbel Smith Professor of Criminology and Associate Dean for Graduate Programs in the School of Economic, Political, and Policy Sciences at the University of Texas at Dallas and Adjunct Professor with the Key Centre for Ethics, Law, Justice, and Governance at Griffith University. From 2008 until 2013 he was Co-Editor of the Journal of Quantitative Criminology. He has published over 350 peer-reviewed articles in the areas of criminal careers, criminological theory, and quantitative research methods, and has collaborated on several books including Key Issues in Criminal Careers Research: New Analyses from the Cambridge Study in Delinquent Development (co-authored with David P. Farrington and Alfred Blumstein), Handbook of Quantitative Criminology (co-edited by David Weisburd), Offending from Childhood to Late Middle Age: Recent Results from the Cambridge Study in Delinquent Development (co-authored with David P. Farrington and Wesley G. Jennings), The Handbook of Criminological Theory, and Offending from Childhood to Young Adulthood: Recent Results from the Pittsburgh Youth Study (co-authored with Wesley G. Jennings, Rolf Loeber, Dustin A. Pardini, and David P. Farrington). He is also Fellow of both the American Society of Criminology and the Academy of Criminal Justice Sciences and in 2014 he received The University of Texas System Regents' Outstanding Teaching Award. Dr. Piquero received his Ph.D. in criminology and criminal justice from the University of Maryland at College Park.  David P. Farrington is Emeritus Professor of Psychological Criminology in the Institute of Criminology, Cambridge University. He received the Stockholm Prize in Criminology in 2013. He is Chair of the American Society of Criminology Division of Developmental and Life-Course Criminology. His major research interest is in developmental criminology, and he is Director of the Cambridge Study in Delinquent Development, a prospective longitudinal survey of over 400 London males from age 8 to age 56. In addition to over 650 published journal articles and book chapters on criminological and psychological topics, he has published nearly 100 books, monographs and government reports. 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