This paper addresses the old topic of contextual effects on voting behaviour. Current multilevel analysis techniques provide a powerful tool to (re-)examine such regional influ-ences on individual voting decisions. We apply multilevel analysis to German electoral data. Our results prove evidence...

Unit nonresponse in the second wave of a panel survey is related to several respondent characteristics and to the interviewer of that wave. More striking is the effect of the interviewer of the first wave, who is not involved in the second interview. To analyze both interviewer effects...