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Re: st: question


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: question
Date   Tue, 3 Nov 2009 14:22:32 +0000 (GMT)

--- On Tue, 3/11/09, Tunga Kantarci wrote:
> I wish to calculate a figure where I call coefficient
> estimates and residuals sum of squares and degrees of
> freedom. All these quantities are from the stata
> estimation output. When I run the relevant command 
> -nlcom exp(_b[_cons]+_b[income]*15.3)*exp(e(rss)/e(df_r)/2)- 
>I get the error "could not calculate numerical derivative".
> This is perhaps because e(rss) and e(df_r) are not estimates.

No, this is because these numbers are going to HUGE, so huge
that in many cases a computer can't contain that number. This
to me suggest a conceptual error rather than a Stata error:
why do you want to do this?

-- Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------


      

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