Per-Olof H. Wikstrom, Professor of Ecological and Developmental Criminology at the Institute of Criminology, University of Cambridge, and Professorial Fellow of Girton College,Dietrich Oberwittler, Senior Researcher / Research Group Leader, Max Planck Institute,Kyle Treiber, Research Associate (PADS+),Beth Hardie, Research Manager (PADS+)

Professor Per-Olof H. Wikstrom is Professor of Ecological and Developmental Criminology at the Institute of Criminology, University of Cambridge, and Professorial Fellow of Girton College. He is the director of the Peterborough Adolescent and Young Adult Development Study (PADS+).

Dr Dietrich Oberwittler has been working with Principal Investigator Per-Olof Wikstrom since 2004 when he worked for the SCoPiC Network as a Marie Curie fellow until 2006. His particular expertise revolve around spatial analysis and the neighbourhood dimension of crime.

Dr Kyle Treiber is a Research Associate and occasional lecturer who works particularly with the neurocognitive and biopsychological dimensions of the Peterborough Adolescent of Young Adult Development Study (PADS+).

Beth Hardie is the Research Manager for the Peterborough Adolescent of Young Adult Development Study (PADS+).

"They do not detract from the importance of Breaking Rules' major finding that the likelihood of crime increases with the convergence of crime-prone people in criminogenic environments. This finding has a number of implications for theorizing about, responding to, and preventing crime; it also makes Breaking Rules an important book for many audiences, including academics, policymakers, and others concerned with the origins of adolescent crime." -Bill McCarthy, University of California, Davis, Contemporary Sociology

"The combination of carefully crafted and consistent assumptions about human nature, an extraordinarily rich data set, an equally rich theoretical frame with clear concepts and dynamics, and a series of analyses which allow the reader to see what is happening "under the hood," is unparalleled in this reviewer's recent memory."- Ralph B. Taylor, Professor at the Department of Criminal Justice, Temple University