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From |
"FUKUGAWA, N." <[email protected]> |

To |
[email protected] |

Subject |
Re: st: RE: Listing coefficient of one variable |

Date |
Tue, 13 Sep 2005 22:42:27 +0900 |

```
Dear all,
How can I apply your suggestion to the treatment regression model?
forvalues i=1/100 {
treatreg y a b c if d==`i', treat(c= l m n ) twostep
}
Thank you in advance.
--
FUKUGAWA Nobuya, Ph.D.
[email protected]
Maarten Buis wrote:
> You have three options:
>
> Here all coefficients are different for different values of d:
> forvalues i = 1/100 {
> reg y a b c if d ==`i'
> }
>
> Here only the coefficient of c changes with values of d (and the coefficient of c is the coefficient when d is that specific value of d):
> forvalues i = 1/100 {
> gen dum = d~=`i'
> gen dumXc =dum*c
> di "d = " `i'
> reg y a b c dum dumXc
> capture drop dum dumXc
> }
>
> A more parsimonious model is obtained if you are willing to assume that the parameter of c changes linearly with d. In this case you can just use an interaction term. Here the coefficient of c is the effect of c when d = 0 and the coefficient of dXc is how much the effect of c changes when d increases with one unit:
> gen dXc = d*c
> reg y a b c d dXc
>
> HTH,
> Maarten
>
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On Behalf Of FUKUGAWA, N.
> Sent: dinsdag 13 september 2005 15:02
> To: [email protected]
> Subject: st: Listing coefficient of one variable
>
> Dear all,
> Suppose we run a regression model as follows
> reg y a b c
> and want to know how coefficient of "c" varies according to "d",
> how can I write a program?
>
> Note: "d" is integer between 1 and 100 and does not appear in the model and we
> do not want to write 100 programs such as
> reg y a b c if d==1.
>
> Thanks in advance.
> --
> FUKUGAWA Nobuya, Ph.D.
> [email protected]
> *
> * 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/
> *
> * 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/
>
*
* 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/
```

**Follow-Ups**:**RE: st: RE: Listing coefficient of one variable***From:*"Scott Merryman" <[email protected]>

**References**:**st: RE: Listing coefficient of one variable***From:*"Maarten Buis" <[email protected]>

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