The objectives of this study were twofold: A. Prepare a list of (inter) national best practices and evaluation principles on the social crime of drug-related (economic compulsive and systemic) crime. Creating an inventory of best practices on the social crime of drug-related crime, with a focus on economic compulsive and systemic crime in particular. lnschatten the relationship between perpetrators and socio-demographic variables and the effectiveness of social prevention programs focused on drug-related crime. Assess the relative cost-effectiveness of the studied social prevention programs focused on drug-related crime. Describing the overall evaluation principles of social prevention programs focused on drug-related crime, especially economic crime compulsive and systemic. B. Empirical analysis of existing Belgian projects and provide guidelines on the monitoring and evaluation of social prevention programs focused on drug-related crime, especially economic crime compulsive and systemic.