Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: Interaction and constraint
From
Shige Song <[email protected]>
To
[email protected]
Subject
Re: st: Interaction and constraint
Date
Sun, 2 Jan 2011 19:36:35 -0500
Very nice. Many thanks to both Maarten and Kit.
Shige
On Sun, Jan 2, 2011 at 3:49 PM, Christopher Baum <[email protected]> wrote:
> <>
> Now I want to simply the model by constrainning the second
> (2.group#c.age) and the third terms (3.group#c.age) to be equal
> (suppose that will improve the model fit), how should I do this?
>
>
> With complete generality (which you can apply to other estimators, whether or not they allow constraint options),
>
> use http://www.stata-press.com/data/r11/fvex, clear
> g group23 = group==2 | group==3
> regress y i.group i.group#c.age
> regress y i.group group23#c.age
>
> Kit
>
>
>
> Kit Baum | Boston College Economics & DIW Berlin | http://ideas.repec.org/e/pba1.html
> An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html
> An Introduction to Modern Econometrics Using Stata | http://www.stata-press.com/books/imeus.html
>
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/