Der vorliegende Band geht über einen reinen Tagungsband hinaus. Er enthält neben den Tagungsbeiträgen des Moderators und der Referenten auch zwei Erfahrungsberichte über die Pretests zu zwei Erhebungen nach Paragraph 7 Bundesstatistikgesetz. Inhalt: Kopsch, Günter: Begrüßung. - Mohler,...

Missing survey data occur because of unit and item non-response. This is practically independent of the method of data collection. As a result of the bias that non-response sometimes introduces in survey estimates, identifying factors that promote it, and taking measures of prevention and...

The randomized trial literature has helped to renew the fields of microeconometric policy evaluation by emphasizing identification issues raised by endogenous program participation. Measurement and attrition issues have perhaps received less attention. This paper analyzes the dramatic impact of...