Evaluation of the effects of introduction of district councils in two Amsterdam districts. Wave 1: data on house, street and neighbourhood / membership of, and activity in clubs and organizations / contacts with social service institutions / interest in local problems / opinions on and satisfaction with public facilities and services / knowledge of local politicians / nature of contacts with municipal service institutions / sense of political efficacy / political participation / knowledge of district council / power of decision / expectations and opinions regarding district council / political activity. Wave 2: ( not yet mentioned above ) perceived influence of district council / knowledge of politicians in council / contacts with council members / contacts with local civil servants nature of, and satisfaction with contact / channels of information about council / political action / satisfaction with public facilities and services. Background variables: basic characteristics/ residence/ housing situation/ household characteristics/ occupation/employment/ education/ politics/ organizational membership