sampling
Notes from the GHS
Question
I wish to describe the sampling information of the
GHS. I still need some more details on whether the sample is clustered within
postcode sectors, or is the only clustering within households? I had tried
many sources but the official information is all a bit vague. Could you help
please?
Answer
The sampling for the GHS is described
in the published reports. See: http://www.statistics.gov.uk/downloads/theme_compendia/03_Appendix_B.pdf
for 2003/4. It states that 576 strata are defined by socio-economic characteristics,
and that since 1984 1 postcode sector (postcode sectors being the PSU) is
selected from each stratum. Within each postcode sector 23 addresses are randomly
selected. So this seems to indicate that we've got both stratification and
geographical clustering going on. See Appendix B : http://www.statistics.gov.uk/downloads/theme_compendia/04_Appendix_C.pdf
to see what this means in terms of defts.
