Arjan A.J. Blokland is a senior-researcher at the Netherlands Institute for the Study of Crime and Law Enforcement (NSCR) and a professor of Criminology and Criminal Justice at Leiden University, the Netherlands. His work has been published widely in criminology and psychology journals.
Patrick Lussier is an Associate Professor at the School of Criminology at Simon Fraser University, Canada. He is the co-director of the Centre for Research on Sexual Violence (CrSV) in Burnaby, British Columbia. He is co-principal investigator of the Vancouver Longitudinal Study of the psychosocial development of children. His work has been published in numerous academic journals.