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Web interviewing at Statistics Netherlands: practices so far

Web interviewing at Statistics Netherlands: practices so far. Labour Force Survey The Netherlands Björn Janssen Hendrika Lautenbach April 2010. Web interviewing : out of control?. Why this subject?. Cheap Efficient Respondent friendly High penetration rate of internet.

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Web interviewing at Statistics Netherlands: practices so far

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  1. Web interviewing at Statistics Netherlands: practices so far Labour Force Survey The Netherlands Björn Janssen Hendrika Lautenbach April 2010

  2. Web interviewing: out of control?

  3. Why this subject? • Cheap • Efficient • Respondent friendly • High penetration rate of internet

  4. Contents of presentation • Approach strategy • Mode-effects • Sample for calculating monthly figures

  5. CAWI CAWI / PAPI CAWI CAWI CAWI CAWI / PAPI CAPI / CATI CATI Approach strategy: mixed mode experiences so far CAWI : Letter containing website and log on codes PAPI : Apply for paper questionnaire / return card ICT Crime Shallow method Economy 1 2 CAWI / PAPI CAWI / PAPI 1st 2nd CAWI CAWI CAWI / PAPI CATI (reminder) 3th 4th

  6. Experiments: response levels ICT Crime Shallow Economy Reg 51,4 68,9 61,0 67,6 Exp 33,4 41,6 62,7 67,2 53,0 Internet: +/- 35 % Crime CAPI: 33% (exp) 58% (reg) Crime CATI: 55% (exp) 71% (reg)

  7. Approach strategy: deduced from experiences • - Whole sample: CAWI • CAWI non response • With phone number: CATI • Without phone number: CAPI • - Response • CAWI: 25-35% • Non response CAWI by CATI: ± 50% • Non response CAWI by CAPI: ± 35% • Total response: ± 60%

  8. Approach strategy for subgroups • - Plans to develop different approach strategies for selected subgroups of the sample to increase response. • Possible subgroups: • - Elderly people; • - Non-western immigrants; • - Large households? • - Use of different versions of the introduction letter for the various subgroups.

  9. Mode effects on results • - CAWI differs from CAPI/CATI: no interviewer present to guide the interview; • The phrasing of the questions as posed in CAPI/CATI will sometimes have to be adjusted to allow independant completion. • Use of different modes has effect on the collected data: unknown which effect.

  10. Mode effects: experiences so far • Exchange of respondents • Approaching households not responding to CAWI

  11. Sample for calculating monthly figures at this moment • Households which are part of the monthly sample portions are used for calcuting the monthly figures. • The initial monthly sample is used for follow-up every 3 months (panel).

  12. Sample for calculating monthly figures when introducing CAWI • In the currently chosen approach strategy, the time required to obtain the response of a monthly sample will increase from 1 month to 2-3 months. • Which are the options for calculating monthly figures? • - the response collected in a calendar month? • Which sample should be used for follow-up (panel)?

  13. Subjects of discussion • Should mode-effects on the data be addressed, and if so, in what way? • To increase the response, Statistics Netherlands is considering specific approach strategies for different subgroups. As a result, selected mixed-mode effects for the different groups will be introduced. Is this a problem and should it be avoided? • Using a mixed-mode approach including CAWI, how can the time required for data collection be limited to a month which suits the calculation of monthly figures?

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