Dirk Enzmann is Professor at the University of Hamburg, Faculty of Law, Institute of Criminal Sciences. He teaches criminology at the Faculty of Law and statistical methods at the Faculty of Economics and Social Sciences. He has been a member of the ISRD steering committee since 2005. His research interests include juvenile delinquency, social contexts of crime, analytical criminology, and survey research methods.Janne Kivivuori is Professor of Criminology, Institute of Criminology and Legal Policy, University of Helsinki, serving as the Research Director of the Criminological Unit of the institute. His 2011 book Discovery of Hidden Crime described the history of the self-report crime survey in social science criminology. He has been active in the development of international crime indicators such as the ISRD and the European Homicide Monitor. His research interests include homicide, hate crime, and the role of media in the contemporary experience of crime.Ineke Haen Marshall is Professor of Sociology, Criminology & Criminal Justice at Northeastern University, Boston, USA. She has published in the areas of comparative criminology, drug policy, criminal careers, minorities and crime, and cross-national methodology. She has been involved in the ISRD project from its inception and currently is the chair of the ISRD project.Majone Steketee is chairman of the board of directors of the Verwey-Jonker Institute (The Netherlands) which conducts scientific research on social issues. She is an expert in the fields of youth (care), violence in dependent relationships and mental health and has been involved in international studies of youth crime and intergenerational transfer of domestic violence. She is Professor at the Department of Psychology, Education & Child Studies of the Social Faculty of the Erasmus University in Rotterdam.Mike Hough isa Visiting Professor at the School of Law, Birkbeck, University of London. He founded and directed the Institute for Criminal Policy Research (ICPR) until his retirement in 2016. His research interests include: procedural justice theory; public perceptions of crime; crime measurement and crime trends; and sentencing. He was President of the British Society of Criminology from 2008 until 2011. Martin Killias served for 25 years as Professor of Criminology and Criminal Law at the University of Lausanne. In 2006, he joined the Zurich Law Faculty and, in 2013, the St. Gallen University Law School. Martin Killias has been involved in international crime and self-report surveys as well as in comparative and experimental criminology.