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Re: st: access coefficients from another regression


From   Austin Nichols <austinnichols@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: access coefficients from another regression
Date   Tue, 30 Oct 2012 10:44:24 -0400

Why are you estimating linear models with -nl-? You can use -suest- to
compare across models if you give up -nl-.

On Tue, Oct 30, 2012 at 8:43 AM,  <chw_wagner@gmx.de> wrote:
> Dear StataList,
>
> my model consist of two equations x1 und x2 which I estimate seperatly using non linear least squares in Stata 12. α and β denote the estimated coefficients, y and z the variables.
>
> First I estimate x1 using:
> nl (x1= {α1}*y1+ {α2}*y2 + {α3}*y3)
>
> Then I estimate x2 using:
> nl (x2= {β1}*z1+ {β2*z2 + {β3}*z3)
>
> After the estimation I want to calculate a new coefficient γ using the coefficient α1 from the first equation and β1 from the second equation using the nlcom command, for example:
>
> nlcom (γ= α1/β1)
>
> My question is now, how can I access the coefficient α1 from the first equation x1? How would the code for the nlcom command look like?
>
> Thanks a lot in advance.
>
> Christina

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