Re: st: How to add restriction condition in Stata

[Richard Williams <Richard.A.Williams.5@ND.edu>]

At 11:51 AM 7/29/2005 -0400, Raymond wrote:
> Thanks!
> But the reason I make coeffients of age1 and age2 be equal is to solve
> an identification
> problem. So, I cann't just sum them up.
I'm not sure how you are getting an identification problem in a poisson 
regression or how setting the effects for 2 dummies equal solves it.  Maybe 
you should write out your model.  But in any event, I think the test 
command I gave before will still work; and the poisson command does support 
constraints, so you could do

constraint 1 age1=age2
poisson y age1 age2, constraints(1)

*
*   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/