The significance of ambiguity – Evidence-based practice in social service with children and youth. Evidence-based practice (EBP) has gained a central position as a model of knowledge for social work in the public sector. In the Swedish Government Report about knowledge-based social work from 2008, EBP is described as a useful way of structuring the social services on a scientific basis (SOU 2008:18). Following on this, and in order to establish EBP in social work practice, between 2009 and 2016, there were annual agreements between the government and the Swedish Association of Local Authorities and Regions (SALAR). As defined by the annual agreements, a national network of Regional Development Leaders (regionala utvecklingsledare) was given...