Inside the black box: Experiences and perspectives of young people and professionals in residential youth care.The International Journal of Child and Family Welfare (IJCFW) is an official publication of the European Scientific Association on Residential and Family Care for Children and Adolescents (Eusarf). The journal is a multidisciplinary, peer-reviewed publication. The International Journal of Child and Family Welfare publishes empirical papers (including meta-analyses) and review papers, dealing with issues related to all fields of child and family welfare and with issues related to child and youth care (e.g., home-based care, family foster care, residential youth care). The journal is specifically interested in studies that focus on care and treatment processes in association with outcomes and effects; these studies can generate more insights into how interventions work and what care aspects make a difference for vulnerabe childen and families.Guest editors on this issue: Annemiek T. Harder, Erik J. Knorth & James P. Anglin