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From |
"J. Li" <lij53@univmail.cis.mcmaster.ca> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: putting constraint on self-written program using ml d0 |

Date |
Thu, 27 Aug 2009 18:49:05 -0400 |

Thanks Michael. I will try that out. I don't know if that could change the result though. I am not sure about the [eq2] part neither. But given that in the ml program, I use mleval to obtain the intermediate variables from the parameters as following: mleval `mu' = `b', eq (1) mleval `a1' = `b', eq (2) scalar mleval `a2' = `b', eq (3) scalar mleval `a3' = `b', eq (4) scalar mleval `a4' = `b', eq (5) scalar So I suppose when I want to contrain the parameter of the first cut-off value as 1.45, I should specify the equation name as eq2 so it is consistent with the name used in "mleval". Is this right? Or should I use constraint 1 [a1]_cons=1.45 instead? Thanks!! Jinhu On Wed, 26 Aug 2009 14:52:19 -0700 michael schihl <iamisha@hotmail.com> wrote: > 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 > > * > > * 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/ > _________________________________________________________________ > Windows Live: Keep your friends up to date with what you do online. > http://windowslive.com/Campaign/SocialNetworking?ocid=PID23285::T:WLMTAGL:ON:WL:en-US:SI_SB_online:082009 > * > * 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/

**References**:**st: putting constraint on self-written program using ml d0***From:*"J. Li" <lij53@univmail.cis.mcmaster.ca>

**RE: st: putting constraint on self-written program using ml d0***From:*michael schihl <iamisha@hotmail.com>

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