Estimating nonresponse bias and mode effects in a mixed-mode survey
Peter Lugtig
Utrecht University
Gerty J.L.M. Lensvelt-Mulders
University for the Humanistics
Remco Frerichs
TeamVier research BV
Assyn Greven
Quint result BV
Introduction
It is becoming more difficult and costly to conduct surveys among the general population (Groves 2005). This is mainly because of the fact that response rates have been slowly decreasing over the past decades (de Leeuw & de Heer 2002). Although this does not necessarily mean that coverage and non-response bias have been increasing as well (see Groves & Peytcheva 2008), survey researchers are nowadays trying to tailor...