Abstract: | This article analyses agency collaboration to help vulnerable children and adolescents with complex social and psychological problems, examining the implementation of a formal collaboration model for these groups. This model, implemented in Västra Götaland, Sweden, involves five municipal agencies and five county council agencies in 49 different municipalities. Data were collected using two questionnaires sent to 355 lower managers and 424 professional representatives in the concerned organizations. The analysis demonstrates that there are differences in implementation results between the agencies, and that the differences are largely explainable by organizational self-interest and top management prioritization of collaboration model implementation. The main barriers to collaboration are factors modifiable by the agencies themselves, and perceived barriers decreased when the policy was working. The study suggests that managers of human service organizations must assume responsibility when implementing collaboratively, and that accountable professional and political leaders must rise above organizational interests to protect vulnerable citizens. |