Thanks for the reply. Most helpful.
If I follow the suggestion below and eliminate NW then I'm not denormalizing and creating the country specific weight (CSW) that I thought was the recommended process for pooled surveys? Did I miss something obvious?
Thanks again.
Carrie
gen wt= v005/1000000
egen strata=group(v000 v025 ADM1_CODE) // strata also includes the survey (identified by v000) in the group command
egen v001r = group(v000 v001) // cluster also includes the survey in the group command
svyset v001r [pw=wt], strata(strata) singleunit(centered)
svy: tab ADM1_CODE