Abstract
In this paper, we present an ongoing research project aimed to determine the impact of co-financing on collaboration around patients with musculoskeletal disorders. A trial legislation that allows the social insurance, social services and health care services to unite in co-financing under joint political steering has been tested in different areas in Sweden. In a series of studies, we compare collaboration processes and health outcome for patients with musculoskeletal disorders between health centres with co-financing projects and control health centres without co-financing projects. In this paper the studies are described and some preliminary results are discussed.