Web interviewing at statistics netherlands practices so far
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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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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

Web interviewing: out of control?


Why this subject

Why this subject?

  • Cheap

  • Efficient

  • Respondent friendly

  • High penetration rate of internet


Contents of presentation

Contents of presentation

  • Approach strategy

  • Mode-effects

  • Sample for calculating monthly figures


Web interviewing at statistics netherlands practices so far

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


Web interviewing at statistics netherlands practices so far

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)


Approach strategy deduced from experiences

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%


  • Approach strategy for subgroups

    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.


    Mode effects on results

    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.


    Mode effects experiences so far

    Mode effects: experiences so far

    • Exchange of respondents

    • Approaching households not responding to CAWI


    Sample for calculating monthly figures at this moment

    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).


    Sample for calculating monthly figures when introducing cawi

    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)?


    Subjects of discussion

    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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