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st: conformability error for logit model of subpopulation


From   "Elizabeth Mumford" <eam222@verizon.net>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: conformability error for logit model of subpopulation
Date   Wed, 09 May 2007 07:34:11 -0400

This seems to have come up in April 2006, but I cannot find a resolution in
the archives.  The author indicated that inteff does not work with svy data.
At the same time, Stata Tech Support kindly confirmed the syntax but I
repeatedly get a conformability error r(503) for subsamples of the
population (inteff works for the full sample):

svy: logit HSdip Fpov90 gender3 povgen IV1...IVn if white==1
*or:
svy, subpop(white==1): logit HSdip Fpov90 gender3 povgen IV1...IVn *and
then, following either of the previous logit models: inteff HSdip Fpov90
gender3 povgen IV1...IVn if white==1

Various efforts (ignoring survey design, per author's guidance; changing
subsample; forcing Stata version 8.2, per an archived suggestion) have not
removed the problem.  I consistently can only run inteff after a logit model
of the full sample.

Any ideas would be much appreciated.

Elizabeth Mumford
eam222@verizon.net



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