Support #150
How to combine two waves?
Added by Sabrina Khan almost 11 years ago.
Updated almost 11 years ago.
Description
I have been referring to various literature available on how to combine the two waves in USoC and am a bit confused, either to use merge or append? Could you please guide me how to combine the entire datasets of Wave 1 and 2? And secondly how can I use the BHPS identifier - hidp and individual identifier - pidp, to identify the respondents from the BHPS? is there any literature available somewhere that might be useful?
Thanks!
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pidp is the unique personal identifier across all waves and be used for merging data on the same individuals from different waves.
From the user guide (p.42):
“For longitudinal analysis of the GPS sample, cases may be matched to Wave 1 data, available as part of this release from the UK Data Service, using the variable pidp, the Understanding Society cross wave person identifier.
However for the BHPS sample, a different identifier will need to be used: the variable pid, which is the BHPS cross-wave person identifier. The pid identifier is available in all person level files in the Understanding Society Wave 2 release and in the 18-wave BHPS longitudinal data set, available separately from UK Data Service.”
The cases in the two samples can be distinguished using the variable b_memorig (INDSAMP) or b_hhorig (enumeration and response files).
Jakob
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