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st: Stata error message from svy command

From   K C Wong <>
Subject   st: Stata error message from svy command
Date   Mon, 21 Jan 2013 15:36:21 +1300

Hi Statalisters.

I'd like to ask what does this Stata error message, "poststratum
weights must be constant within poststrata" mean?
How do I go about to find out the problem and thus to solve it?
Stata gives me this error message after I run
svyset _n,  poststrata(poststrata) postweight(aweight)
svy, subpop(european): logistic case  i.age_cat i.interviewmethod
i.status i.deprivation

Your help is greatly appreciated. Have a good week.
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