Health psychology is frequently described as behaviour-oriented, public health as system-oriented. This study examines how political participation and health behaviour of individuals on one hand and system behaviour in terms of healthy policy on the other may represent common issues to the two fields. Theoretically it refers to social ecology and health promotion approaches such as community psychology and WHO s Ottawa Charter. Empirically, data gathered within the EU-Biomed2-Project MAREPS in population and policymaker surveys in Belgium, Finland, Germany, the Netherlands, Spain and...