Ronald Clarke is university professor in the school of Criminal Justice at Rutgers, The State University of New Jersey, and visiting professor at the Jill Dando Institute of Crime Science, University College London. He worked for many years in the Home Office Research and Planning Unit, where he contributed to the development of situational crime prevention and the British Crime Survey. He is associate director of the Center for Problem-Oriented Policing and chair of the judges for the annual Herman Goldstein Award for Excellence in Problem- Oriented Policing. He can be reached at: rclarke@andromeda.rutgers.edu.

John Eck is professor of criminal justice at the University of Cincinnati. He has contributed to the development of problem-oriented policing since 1984 when he studied the first full-scale attempt to implement the concept in the United States at Newport News, Virginia. He helped to develop a number of now standard techniques in problem-oriented policing, including the SARA model and the problem analysis triangle. Dr. Eck is an affiliate member of the Center for Problem-Oriented Policing. He is a judge for the Tilley Award for Excellence in Problem-Oriented Policing. Dr. Eck was a member of the Committee to Review Research on Police Policy and Practice (2000-2003) of the National Academy of Sciences. He can be reached at: john.eck@uc.edu.