- Arizona State University
- Danish Crime Prevention Council
- Dutch Ministry of the Interior
- Dutch Ministry of Justice
- E. Desmond Lee Collaborative Vision, University of Missouri-St. Louis
- Economic and Social Research Council (UK)
- German Ministry of Justice
- Jerry Lee Foundation
- Municipality of Oslo
- National Consortium of Violence Research (NCOVR)
- Norwegian Association of Local and Regional Authorities (KS)
- Norwegian Ministry of Children and Family
- Norwegian Ministry of Children, Equal Opportunity and Inclusion
- Norwegian Research Council
- Norwegian Ministry of Justice
- Stockholm Gang Intervention and Prevention Project
- University of Illinois-Chicago
- University of Missouri – St. Louis
- University of Nebraska – Omaha
- University of Southern California
- US Department of Justice, National Institute of Justice
- US Department of Justice, Office of Juvenile Justice and Delinquency Prevention