Ralph B. Tayloris Professor Emeritus of Criminal Justice at Temple University, USA, and a fellow of the American Society of Criminology. He holds a PhD in social psychology from Johns Hopkins University and has authored or co-authored over 90 refereed journal articles in criminal justice, criminology, social psychology, sociology, public health, urban affairs, and law and human behavior. His externally funded research has been supported by the National Science Foundation, the National Institute of Mental Health, the National Institute of Justice, and other sources. He has previously served on the editorial boards ofCriminology and Public Policy, Environment & Behavior,Journal of Criminal Justice, Journal of Quantitative Criminology,Justice Quarterly,andSocial Psychology Quarterly.He is the author ofResearch Methods in Criminal Justice(McGraw-Hill, 1994),Breaking Away from Broken Windows(Westview, 2001),Community Criminology(New York University Press, 2015), andHuman Territorial Functioning(Cambridge University Press, 1988); the editor ofUrban Neighborhoods(Praeger, 1986); and a co-editor ofCrime and Justice 2000 Volume 1: Continuities and Change(National Institute of Justice, 2000). He began teaching multilevel models to graduate students in the late 1990s. Lists of publications and descriptions of research interest areas appear at www.rbtaylor.net.