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Re: st: Parameters returned by -lincom- after -logistic-
I think I have found the answer to this particular sub-query. As stated on
Page 9 of -[SVY]-, -lincom- after -svy- commands automatically fails in the
case of vector degrees of freedom, which corresponds to
This can be confirmed by looking inside the official Stata 8 file
-_svylc.ado-. I for one would be surprised if Stata 9 is any different in
this respect. Thanks to Richard Williams for all the pointers so far.
At 14:43 09/05/2005, I wrote:
At 13:30 09/05/2005, Richard wrote:
p. 37 of the Stata 8 svy manual gives returned values and some
formulas. e(df_m) and e(df_r) don't quite correspond to the d.f.
reported by the F stat but I suspect there is some trivial formula that
shows the relationship. I know that, in writing my own program, I had to
make sure e(df_r) was available when svy was used, otherwise I got z's
instead of t's reported.
I think the -e(df_r)- of Page 37 of -[SVY]- probably applies to the case
of scalar degrees of freedom, but not to the case of vector degrees of freedom.
Lecturer in Medical Statistics
Department of Public Health Sciences
Division of Asthma, Allergy and Lung Biology
King's College London
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