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st: RE: post-stratification

From   "Sayer, Bryan" <>
To   "'Henrique Neder '" <>, "' '" <>
Subject   st: RE: post-stratification
Date   Tue, 17 Sep 2002 17:26:16 -0400

There is a (in my opinion not very populated) school of thought that says
that the post-stratification and raking of weights changes variance
estimates.  I am only aware of WesVar specifically addressing this issue. 

If you accept that the scale of the weights does not have much (if any)
impact on the estimates, then the standard -svy- commands in Stata work
fine.  The advantage of post-stratification is that you get totals that have
meaning, like the number of people unemployed.

Bryan Sayer
Statistician, SSS Inc.

-----Original Message-----
From: Henrique Neder
Sent: 9/17/02 4:09 PM
Subject: st: post-stratification

I corrected the message because it had made a mistake when referring to
post-estimation. In reality it is post-stratification. The right message

Did anybody already work with post-stratification in complex survey
samples (cluster sampling) using Stata or know some work about this? I
have some data - a household survey using two-stage sampling with
weights and "post-stratification factors" (I don“t know if this is the
correct name), the identificator of PSUs and Strata and I want to
estimate confidence intervals for poverty indicators. The survey (svy)
Stata doesn't have sub-commands to consider post-stratification. 

Thanks in advance

Henrique Neder

Instituto de Economia
Universidade Federal de Uberlāndia
Minas Gerais - Brazil

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