 The studys goal is to evaluate whether home treatment is an effective and efficient alternative to inpatient care for people with acute mental illness. Patients who meet the studys inclusion criteria are randomly assigned to either the condition home treatment or inpatient care treatment-as-usual, during one year. Following two years, the two treatment modalities will be analyzed in terms of inpatient days, cost effectiveness, rehospitalization rate, severity of symptoms and sociodemographics. 