Lee Ellis earned his PhD from Florida State University in 1982. For most of his teaching career, he was professor of sociology at Minot State University in North Dakota. After retiring from MSU in 2008, Dr. Ellis accepted a two-year visiting professorship at the University of Malaya in Kuala Lumpur, Malaysia, where he conducted research. Now semi-retired, he continues conducting research and authoring articles and books including Handbook of Crime Correlates and Handbook of Social Status Correlates.David P. Farrington is Emeritus Professor of Psychological Criminology at Cambridge University. His major research interest is in developmental criminology, and he is Director of the Cambridge Study in Delinquent Development, which is a prospective longitudinal survey of over 400 London males from age 8 to age 61. In addition to 775 published journal articles and book chapters on criminological and psychological topics, he has published 111 books, monographs and government publications, and 156 shorter publications (total = 1,042).Anthony Hoskin is an Associate Professor of Sociology at Idaho State University. He received his PhD in Sociology in 1999 at the Sate University of New York in Albany, and has taught at universities in Pennsylvania, California, and Texas before returning to Pocatello, Idaho, his hometown. Professor Hoskin has published research on a variety of social topics, with most of it centered around the causes of crime and interpersonal violence.