Internet data collection in the lfs danish experiences
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Internet data collection in the LFS Danish experiences. Paris, April 2010. Outline. Background Preparations The pilot Going full-scale Quality? Further work. Background 1. The Danish LFS has individuals as sampling unit

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Internet data collection in the lfs danish experiences

Internet data collection in the LFS Danish experiences

Paris, April 2010


Outline
Outline

  • Background

  • Preparations

  • The pilot

  • Going full-scale

  • Quality?

  • Further work


Background 1
Background 1

  • The Danish LFS has individuals as sampling unit

  • Until 2010 household variables collected via proxy in final interview

  • From Q1 2010 Denmark collects household variables as required by regulation no. 577/98


Background 2
Background 2

  • Grant given from Eurostat in 2008

  • Initial work on differences between CATI- and CAWI-interviews


Preparations
Preparations

  • Discussions on collection modes:

    • How much CATI?

    • How many reminders?

    • Letter vs. phone reminders?

  • Two parallel universes


The pilot
The Pilot

  • Two reference weeks as sample

  • Two weeks interview period

  • Two groups: Aldi vs. Irma

    • Aldi: baseline with no reminders

    • Irma: Two phone reminders and optional CATI


Pilot the results
Pilot – the results

  • What was learned:

    • Reminder needed

    • 2nd reminder not necessary

    • CATI option needed

  • Showed that a pilot was essential


Going full scale
Going full-scale

  • Not a big problem

  • Not possible to keep as separate universes – today one big survey.



Quality
Quality

  • Accepted a possibly lower quality.

  • Primary issues: NACE, ISCO

  • Further study needed

  • Setup test vs. quality test


Further work
Further work

  • In-depth quality analysis

  • Coding of NACE and ISCO

  • Analysing the mode effects of CAWI in core-LFS


Thank you

Thank you!

Paris, February 2010

Sammy Lauritsen ssl@dst.dk