Hits 1-2 within 2 documents
Surveys from inside: an assessment of unit nonresponse bias with internal criteria [journal article]
Source: Survey Research Methods, 1 (2007) 2. p.55-67
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