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The mobile-only population in Portugal and its impact in a dual frame telephone survey

Die Mobiltelefonbevölkerung in Portugal und ihr Einfluß auf eine telefonische Dual-Frame-Befragung
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Vicente, Paula; Reis, Elizabeth

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Abstract "In 2007 the percentage of mobile-only households in Portugal reached 36%; this is one of the highest levels in EU27 countries according to the EU E-Communications Households Survey. To assess the extent and nature of the potential bias in fixed phone surveys created by the absence of mobile-only households, a dual frame survey was conducted in which both fixed phones and mobile phones were used to collect data. There are significant differences between fixed phone respondents and mobile-only respondents in several demographic variables; however, we find that merging the fixed phone and the mobile-only sample produces general population estimates on substantive variables that are not significantly different from those obtained with the fixed phone sample alone." (author's abstract)
Keywords Portugal; cell phone; telephone; telephone interview; comparison; private household; error; method; response behavior; impact; influence; survey
Classification Research Design; Methods and Techniques of Data Collection and Data Analysis, Statistical Methods, Computer Methods
Document language English
Publication Year 2009
Page/Pages p. 105-111
Journal Survey Research Methods, 3 (2009) 2
Status Published Version; peer reviewed
Licence Deposit Licence - No Redistribution, No Modifications