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RE: st: putting constraint on self-written program using ml d0


From   michael schihl <iamisha@hotmail.com>
To   stata list-post <statalist@hsphsun2.harvard.edu>
Subject   RE: st: putting constraint on self-written program using ml d0
Date   Wed, 26 Aug 2009 14:52:19 -0700

I think that the constraint definition should be
 
constraint 1 [eq2]_cons=1.45
 
That is, it should not include the word "define."
 
I'm not sure about the [eq2] part.  I'm still working on ml stuff myself...
 

 > From: lij53@univmail.cis.mcmaster.ca
> Subject: st: putting constraint on self-written program using ml d0
> To: statalist@hsphsun2.harvard.edu
> Date: Wed, 26 Aug 2009 16:54:06 -0400
> 
> Hi all,
> 
> I wrote a program using ml package with d0 method. The purpose of the
> program is similar with the ordered probit regression command oprobit.
> After I define the program, I would like to impose some constraints on
> the parameter of the cut-off values. E.g. I use ml model as
> 
> ml model d0 etai (hlthc=age gender index, nocons) /a1 /a2 /a3 /a4,
> constraint (1)
> 
> where a1 a2 a3 a4 are four seperate equations defined in the program to
> substitute in four cut-off values with "mleval" (we have 5 outcomes of
> y in the data). How can I define the constraint? When I tried 
> 
> constraint 1 define [eq2]_cons=1.45
> 
> or 
> 
> constraint 1 define [eq2]a1=1.45
> 
> it gave me some error message. Do you know the reason for this? Thanks
> a lot!
> 
> Jinhu 
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