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Support #1312

Date of interview UKHLS, Harmonised BHPS, BHPS

Added by Georgios Chrysanthou about 2 months ago. Updated about 1 month ago.

Status:
Feedback
Priority:
Normal
Category:
Harmonisation
Target version:
-
Start date:
02/12/2020
Due date:
% Done:

80%

Estimated time:

Description

BHPS had variables "doid/doim/doiy4" as "Date of interview: day/month/year".
These in the Harmonaised BHPS "istrtdatd/istrtdatm/istrtdaty" are "Date of interview: day/month/year". Are these equivalent (it seems they are)?

The UKHLS has "istrtdatd/istrtdatm/istrtdaty" are "Interview start date: day/month/year".
And also the UKHLS has "intdatd_dv/intdatm_dv/intdaty_dv" as "Interview date: Day/Month/Year, derived".

Finally, UKHLS additionally has interview end related varibles: ienddathh ienddatmm ienddatss ienddaty ienddatm ienddatd (hours, mins, secos, year, month, day).

Are the Harmonaised BHPS "istrtdatd/istrtdatm/istrtdaty" and the UKHLS "intdatd_dv/intdatm_dv/intdaty_dv" equivalent variables?
If one wishes to control for the month&year of interview using the harmonised BHPS and UKHLS is it OK to use for the Harmonaised BHPS "istrtdatm/istrtdaty" and for the UKHLS "intdatm_dv/intdaty_dv"?

What is more, is the interview spanning just one calendar day? What is the duration/max duration?
Many thanks in advance.

History

#1 Updated by Georgios Chrysanthou about 2 months ago

BHPS had variables "doid/doim/doiy4" as "Date of interview: day/month/year".
These in the Harmonaised BHPS "istrtdatd/istrtdatm/istrtdaty" are "Date of interview: day/month/year". Are these equivalent (it seems they are)?

The UKHLS has "istrtdatd/istrtdatm/istrtdaty" are "Interview start date: day/month/year".
And also the UKHLS has "intdatd_dv/intdatm_dv/intdaty_dv" as "Interview date: Day/Month/Year, derived".

Finally, UKHLS additionally has interview end related varibles: ienddathh ienddatmm ienddatss ienddaty ienddatm ienddatd (hours, mins, secos, year, month, day).

Are the Harmonised BHPS "istrtdatd/istrtdatm/istrtdaty" and the UKHLS "intdatd_dv/intdatm_dv/intdaty_dv" equivalent variables?
If one wishes to control for the month&year of interview using the harmonised BHPS and UKHLS is it OK to use for the Harmonaised BHPS "istrtdatm/istrtdaty" and for the UKHLS "intdatm_dv/intdaty_dv"?

What is more, is the interview spanning just one calendar day? What is the duration/max duration?

#2 Updated by Stephanie Auty about 1 month ago

  • % Done changed from 0 to 50
  • Assignee changed from Alita Nandi to Stephanie Auty

Dear Georgios,

In the harmonised datasets, variables with different names in BHPS were renamed to the UKHLS equivalent, so yes, doid/doim/doiy4 were renamed to istrtdatd/istrtdatm/istrtdaty.

intdatd_dv/intdatm_dv/intdaty_dv are not the same as they include imputed data, and are available for all household members rather than just adult interviews. The description in the online documentation explains this, e.g. https://www.understandingsociety.ac.uk/documentation/mainstage/dataset-documentation/variable/intdatd_dv

The end date variables are only available from Wave 5 onwards. As we are now fielding many questionnaires via web it may be more likely that people would not complete their interview in one sitting, and there is also the ability for an interviewer to visit the home of someone who started their interview online to try to complete it with them, and in that case it would be on a different day. The end hour and minute variables are available for all waves of BHPS and UKHLS, and in BHPS these would be recorded manually. The end seconds variable is available from UKHLS Wave 1 when CAPI interviewing began. I will check with the fieldwork team whether it can be assumed that all interviews before Wave 5 were completed on the same day they began.

Best wishes,
Stephanie

#3 Updated by Stephanie Auty about 1 month ago

  • Private changed from Yes to No

#4 Updated by Stephanie Auty about 1 month ago

  • Status changed from New to In Progress

#5 Updated by Stephanie Auty about 1 month ago

  • % Done changed from 50 to 80
  • Assignee changed from Stephanie Auty to Georgios Chrysanthou
  • Status changed from In Progress to Feedback

Dear Georgios,

The fieldwork team say it is reasonable to assume that interviews before Wave 5 were completed on the same day they began.

Best wishes,
Stephanie

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