Many thanks Maarten,
I think the problem was that I had not given a name to this new parameter
that I was testing.
The following syntax gave me the correct result:
nlcom ((tmp:1/(_b[eq1:`bid'])*log(1+exp(_b[s:_cons]))
Thanks once again,
JP
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Maarten buis
Sent: Tuesday, March 18, 2008 3:43 AM
To: [email protected]
Subject: Re: st: nlcom after ML estimation
Or even better (without my typo):
nlcom ((1/[eq1]_b[bid2])*log(1+exp([s]_b[cons])))
--- Maarten buis <[email protected]> wrote:
> Try:
> nlcom ((1/[eq1]_b[bid2])*log(1+exp([s:]_b[cons])))
>
> hope this helps,
> Maarten
>
> --- JP Azevedo <[email protected]> wrote:
>
> > Hello,
> >
> > I'm trying to implement a Walt test of a nonlinear combination of a
> > couple of coefficients that have estimated on a loglikelihood
> > function
> that
> > I
> > programmed myself.
> >
> > The problem is that my model has two equations, and I think the
> nlcom
> > command is having problems with the labelling of the variables:
> >
> >
> > . nlcom ((1/_b[eq1:bid2])*log(1+exp(_b[s:_cons])))
> >
> > invalid name: (1/_b[eq1
> > r(198); t=0.02 21:42:55
> >
> > Can anyone help?
> >
> > Cheers,
> >
> > JP
> >
> >
> > *
> > * For searches and help try:
> > * http://www.stata.com/support/faqs/res/findit.html
> > * http://www.stata.com/support/statalist/faq
> > * http://www.ats.ucla.edu/stat/stata/
> >
>
>
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology Vrije Universiteit Amsterdam
> Boelelaan 1081
> 1081 HV Amsterdam
> The Netherlands
>
> visiting address:
> Buitenveldertselaan 3 (Metropolitan), room Z434
>
> +31 20 5986715
>
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
>
>
> ___________________________________________________________
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> *
> * For searches and help try:
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> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
___________________________________________________________
Rise to the challenge for Sport Relief with Yahoo! For Good
http://uk.promotions.yahoo.com/forgood/
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
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