Hits 1-2 within 2 documents
The effect of incentives on response rates and panel attrition: results of a controlled experiment [journal article]
Source: Survey Research Methods, 2 (2008) 3. p.151-158
Sind Umfragen das Allheilmittel zur Begleitung politischer Kampagnen? [journal article]
Source: Zeitschrift für Politikberatung, 2 (2009) 3. p.560-561