Detailed background data on marriage and family / religion and occupation / satisfaction with job / household and mutual friends / perceptions of partner / personal worries / relationships with mutual friends / self description / personal problems / opinions on financial matters / socio-cultural and recreational activities of both partners / sexual relationship / relations with family / mutual relationship and the solving of mutual problems / reasons for divorce. Background variables: basic characteristics/ residence/ household characteristics/ occupation/employment/ education/ social class/ religion