Lorraine Mazerolle is Professor of Criminology in the School of Social Science at the University of Queensland and Co-Chair Campbell Collaboration Crime and Justice Coordinating Group. She is also a Chief Investigator with the ARC Centre of Excellence for Children and Families over the Life Course (LCC). ​ Lorraine was an Australian Research Council Laureate Fellow (2010–2015). She is the Editor-in-Chief of the Journal of Experimental Criminology, past Chair of the American Society of Criminology’s (ASC) Division of Experimental Criminology (2014–2015), an elected Fellow and past president of the Academy of Experimental Criminology (AEC), and elected fellow of the Academy of the Social Sciences, Australia. ​ Lorraine’s research interests are in experimental criminology, policing, drug law enforcement, regulatory crime control, and crime prevention.

Peter Neyroud is a lecturer in evidence-based policing at the Institute of Criminology, University of Cambridge. He is also the Co-Chair Campbell Collaboration Crime and Justice Coordinating Group. ​ Peter has been a Resident Scholar at the Jerry Lee Centre for Experimental Criminology managing a major research program, Operation Turning Point: a randomised controlled trial testing offender desistance policing. He has taught senior police leaders and advised governments across the world and in the UK on criminal justice reform. ​ Prior to his academic career, Peter served as a police officer for 30 years. He set up and ran the National Policing Improvement Agency as CEO. In 2010, he carried out the Review of Police Leadership and Training which led to the establishment of the new National College of Policing. ​ Peter is the Vice-Chair of the Internet Watch Foundation. He was awarded the Queens Police Medal in 2004 and a CBE in the Queen's Birthday Honours List in 2011. His research interests centre on field experiments in policing, pre-court diversion, crime harm and the implementation and leadership of change in criminal justice agencies.