This paper investigates if significant differences exist between online and paper & pencil participants in a quarterly business survey in the German business?related services sector when respondents may freely choose to respond either online or by more conventional methods. It also analyzes the...

Theory predicts a positive relationship between market concentration and profitability in most scenarios. In empirical work, however, this relation is frequently not found or only a weak connection is observed. We compare the performance of concentration and market share variables, which are...

Die vorliegende Arbeit beschreibt die Konzeption und Erhebung der ZEW-Gründerstudie. Bei dieser im Jahre 1999 am ZEW durchgeführten telefonischen Unternehmensbefragung wurde auf Basis der ZEW-Gründungspanels Ost und West eine geschichtete Stichprobe von 12.000 Unternehmen gezogen. Für diese...

Die zunehmende Verbreitung und Nutzung des Internets innerhalb unserer Gesellschaft hat dazu geführt, dass die Dienste des Internets, v.a. das World Wide Web (WWW), auch für die empirische Forschung interessant geworden sind. Das WWW ermöglicht eine neue Form der schriftlichen Befragung,...

In this paper we analyse whether the recording behaviour of consumers keeping a payment diary changes over the diary period. Using data from a large study on the payment behaviour of German consumers we find that individuals tend to report a higher number of transactions on the first day of the...

Using data on annual individual labor income from three representative panel datasets (German SOEP, British BHPS, Australian HILDA) we investigate a) the selectivity of item non-response (INR) and b) the impact of imputation as a prominent post-survey means to cope with this type of measurement...

Using data on annual individual labor income from three representative panel datasets (German SOEP, British BHPS, Australian HILDA) we investigate a) the selectivity of item non-response (INR) and b) the impact of imputation as a prominent post-survey means to cope with this type of measurement...