ECHP-SCPR, ECHP-ONS, and ECHP-NI
I am trying to understand the values of memorig, which codes the subsample in BHPS. I understand the meaning of values 1, 5, 6, and 7 (which are original, Wales, Scotland, and Northern Ireland). I know that 3, 4, or 5 is the subsample of low-income households, but I can't figure our which one of these three exactly codes that set, and what the other two are for.
The abbreviations in the dataset are:
2 = ECHP-SCPR
3 = ECHP-ONS
4 = ECHP-NI
Could you update the BHPS documentation or add a document on the website to explain the difference between these subsamples? Thanks.