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Adding a Mode as a Final Step in the Follow-up of a Panel Survey

Adding a Mode as a Final Step in the Follow-up of a Panel Survey. Seminar on New Frontiers for Statistical Data Collection Geneva , Switzerland , 31 October – 2 November 2012 Birgitta Göransson, Statistics Sweden Anton Johansson, Statistics Sweden. About the Survey.

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Adding a Mode as a Final Step in the Follow-up of a Panel Survey

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  1. Adding a Mode as a Final Step in the Follow-up of a Panel Survey Seminar on New Frontiers for Statistical Data Collection Geneva, Switzerland, 31 October – 2 November 2012 Birgitta Göransson, Statistics Sweden Anton Johansson, Statistics Sweden

  2. About the Survey • Level of LivingSurvey (LNU) • The survey is commisioned by Stockholm Universitysince 1968 • Panel survey • 10 yearsbetweeneachwave • Statistics Sweden has beeninvolved in data collection in all waves • The most recent wave of the surveybegan in 2010 and wasfinished in 2011

  3. About the Interview • Face-to-face • Telephone as an option • Interviewlengthapproximately 60 minutes • Householdsurvey • Data collection from severalmembers of the respondent´shousehold • Main respondent • Husband/wife/partner • Children between 10-18 yearsold • Herewefocus on the interview with the main respondent

  4. Population and Sample • Target population: Residents in Sweden, 18-74 years old • Sample size: 8889 persons

  5. Response Rates in LNU 1968-2010 90 % 85% 82% 79% 76% 61%

  6. About the Data Collection • Response rate 2010 wasverylowcompared to the response rate in year 2000 • But still, to reach this response rate (61 %) wehadputmucheffort in the data collection: • For example: • Follow-ups of refusals(in somecasesmorethantwotimes) • Usingexperiencedinterviewers in the follow-up of refusals • Tracingphonenumbers and new adresses of noncontacts • Couldanythingmore be done to increase the response rate?

  7. Was it possible to do a thirdfollow-up? • Respondent burden – ”I’vetold you NO twotimesbefore – whycan´t you understandwhatI’msaying?” • Interviewerburden – couldwereallyassign this task to the interviewers? • Wethought that the only option at this stagewas to offer the nonrespondents a veryshortinterview • Therefore, the interviewwasshortened by Stockholm University to approximately 5 minutes

  8. The Additional Mode • A shortinterviewwouldmostcertainlyhave a positive effect on the response rate • But, couldn´twealsogive the respondents the possibility to answer the questions in an optional mode? • Wewanted to try this approach. • Therefore, in the final follow-up, weaddeda paperquestionnairewith the same questionsas in the shorttelephoneinterview

  9. Refusals and Noncontacts Noncontactswereonly given the option to answer the paperquestionnaire Refusalswere given the option to answer the questions in a telephoneinterviewor as a paperquestionnaire

  10. Results of the Final Follow-up 90 % 85% 82% 79% 76% 72% 61%

  11. Results of the Final Follow-up • About half of the additional responses were paperquestionnaires • Response rate before follow-up 61,3 % • Short telephone interviews (earlier refusals) 5,2 % • Paper questionnaires (earlier refusals) 4,0 % • Paper questionnaires (earlier noncontacts) 1,3 % • Response rate after follow-up 71,9 %

  12. Further work is needed • The main concern with the follow-up was to increase the response rate • No evaluation of mode effects with a paper questionnaire • No evaluation if bias changed in the final follow-up • It would be interesting to study this further!

  13. Response Rate in the Different SampleGroups (n=8889)

  14. Response Rate (by Gender) Additionalresponses in the follow-up Response rate beforefollow-up

  15. Additional Responses (by Mode and Gender)

  16. Response Rate (by Age)

  17. Additional Responses (by Mode and Age)

  18. Response Rate (by Education)

  19. AdditionalResponses(by Mode and Education)

  20. Thank You for Your Attention!

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