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RE: st: RE: Listing coefficient of one variable


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: RE: Listing coefficient of one variable
Date   Tue, 13 Sep 2005 18:15:00 +0100

It seems to me that you have had lots 
of good suggestions, and the onus is 
on you to tweak them according to 
the idiosyncrasies of your data, which 
we can only guess at. 

What will be troublesome is if any of those 
100 possibilities doesn't meet the 
assumptions of -treatreg-. Slapping 

capture noisily 

in front may help, e.g. 

forvalues i=1/100 {
	di `i'
	capture noisily treatreg y a b if d==`i', treat(c= l m n ) twostep
}

Nick 
n.j.cox@durham.ac.uk 

FUKUGAWA Nobuya, Ph.D.
nfukugawa@gmail.com
 
> Thank you for your answers.
> A correct model does not include "c" in the main equation.
> treatreg y a b , treat(c= l m n) twostep
> My intention was to list selection-corrected coefficients of 
> "c" according to 
> "d" varying between 1 and 100.
> 
> One suggestion was as follows.
> xi: treatreg y a b i.d*c , treat(c=l m n) twostep
> This model works while I am not sure if it is appropriate to 
> specify "i.d*c" in 
> the main equation.
> 
> Another suggestion was as follows.
> statsby, by(d):treatreg y a b  , treat(c=l m n) twostep
> I obtained error message "treat() invalid r(198);" while the 
> difference between 
> this model and the example shown below is unclear.
> 
> The last suggestion was as follows.
> forvalues i=1/100 {
> treatreg y a b if d==`i', treat(c= l m n ) twostep
> }
> I obtained error message "treatments do not vary r(2000);".
> 
> Any further suggestion will be appreciated.

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