Hits 1-2 within 2 documents
The mobile-only population in Portugal and its impact in a dual frame telephone survey [journal article]
Source: Survey Research Methods, 3 (2009) 2. p.105-111
The impact of incentives and interview methods on response quantity and quality in diary- and booklet-based surveys [journal article]
Source: Survey Research Methods, 4 (2010) 2. p.91-101