This important study offers detailed information obtained by interviewing 1505 Dutch respondents, all second-generation Turkish or Moroccan, alongside members of a native Dutch comparison group. The respondents, all aged 18-35 and residing in Amsterdam or Rotterdam, supplied information relating to their cultural, social and economic integration in the Netherlands. The book describes the strategies deployed to select and interview respondents, including an account of problems and adopted solutions. Furthermore, it outlines the sampling frame and sample selection, as well as issues of non-response, construction and use of compensation weights, and statistical representativeness, concluding with a description of the questionnaire and characteristics of the database.