Re: st: treatreg: extract and store treatment coefficient

[Maarten buis <maartenbuis@yahoo.co.uk>]

--- On Tue, 15/3/11, Oberdabernig, Doris Anita wrote:
> I was wondering if there exists any possibility to store
> the treatment coefficient (and standard error) after a
> maximum likelihood treatreg estimation.
> 
> I estimate several treatreg estimations - with different
> numbers of explanatory variables (also in the treatment
> effects equation). The position of the treatment coefficient
> in e(b) is changing as a result and I cannot access it
> directly.

Whenever possible you should avoid refering to coefficients
by their column number; it is just too easy to introduce a
bug that way. The prefered way to refer to coefficients is 
by their name, like:

*--------------- begin example -----------
webuse labor
generate wc = 0
replace wc = 1 if we > 12
treatreg ww wa cit, treat(wc=wmed wfed)
di _b[wc]
di _se[wc]
*---------------- end example -------------
(For more on examples I sent to the Statalist see: 
http://www.maartenbuis.nl/example_faq )

This also solves your problem.

Hope this helps,
Maarten

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

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


      

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