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Re: st: xtlogit and starting values


From   jlinhart@stata.com (Jean Marie Linhart, StataCorp LP)
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: xtlogit and starting values
Date   Wed, 28 May 2008 14:47:48 -0500

"E. Michael Foster" <mike4kids at gmail dot com> writes:

> stata seems to be ignoring the starting values I'm trying to pass 
> it--I'm sure I'm doing something dumb--can anyone spot my error?
> 
> sysuse auto
> sort mpg
> gen mpgg=group(10)                // make up a fake nesting
> xi: logit foreign weight length i.mpgg
> matrix b=e(b)
> matrix b=b[1,1..2]'                // doesn't seem to matter

<commands deleted>

> matrix list b
> xtlogit foreign weight length , i(mpgg) fe from(b, copy ) trace

Michael is not doing anything wrong; -xtlogit, fe- is ignoring the -from()-
option.  This only affects fixed effects -xtlogit-.  This bug will be fixed in
the next ado-file update.

-xtlogit, fe- is a wrapper for -clogit-.  In the meantime, Michael can work
around this problem by calling -clogit- directly:

. clogit foreign weight length, group(mpgg) from(b, copy)

--Jean Marie
jlinhart@stata.com
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