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%T Differential response rates in postal and web-based surveys in older respondents %A Bech, Mickael %A Kristensen, Morton Bo %J Survey Research Methods %N 1 %P 1-6 %V 3 %D 2009 %@ 1864-3361 %X "Response rates were compared across a postal and a web-based survey containing the same questions about preferences for future for the design of future nursing homes which were sent to a random sample of 10.000 individuals aged 50-75 years. The 10.000 individuals were randomly allocated to receive a postal questionnaire or a letter with a web link to an online version of the same questionnaire. The web-based survey gave a significantly lower response rate than the postal survey. The web-based version improved the sample representativeness with respect to gender but worsened the representativeness with respect to age. Respondents' characteristics in the web-based survey differed significantly from those of respondents in the postal survey with respect to income, education, civil status and health status. The web-based version improved data quality by significantly lowering the number of item non-response and 'don't know' answers. Respondents found it easier to answer the web-based survey. The cost per response was significantly higher for the web-based survey because of the significantly lower response rate compared to the postal survey." (author's abstract) %C DEU %G en %9 journal article %W GESIS - http://www.gesis.org %~ SSOAR - http://www.ssoar.info