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Re: st: constraint estimates


From   Laurel A Copeland <lacop@umich.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: constraint estimates
Date   Fri, 20 Sep 2002 12:26:18 -0400

Constrained estimation:

. constraint define 1 [Uninsure]
. constraint define 2 [Prepaid]: site2 site3
. mlogit insure age male nonwhite site site3, constr(1) basecat(2)
. mlogit insure age male nonwhite site site3, constr(2) basecat(2)
. mlogit insure age male nonwhite site site3, constr(1-2)

among other things. their sytax looks different from yours. does this matter? i am new so don't know.

From opening a log file then typing -findit mlogit constraint-
the viewer contains:

Keyword search

Keywords: mlogit constraint
Criterion: Select only entries that have ALL the above words (*)
Search: (1) Official help files, FAQs, and STBs
(2) Web resources from Stata and from other users

* To search entries that have ANY of the above words, type
findit mlogit constraint, or


Search of official help files, FAQs, and STBs

[R] mlogit . Max.-likelihood multinomial (polytomous) logistic regression
(help mlogit)

Example . . . . Textbook examples: Applied Logistic Regression (2nd Edition)
. . . . . . . . . . . . . . . . . . UCLA Academic Technology Services
6/01 http://www.ats.ucla.edu/stat/books/alr2/default.htm
examples from the book Applied Logistic Regression
(2nd Edition) by David Hosmer and Stanley Lemeshow

STB-61 sg163 . . . . . . . . . . . . . . . . . Stereotype ordinal regression
(help soreg if installed) . . . . . . . . . . . . . . . . . . M. Lunt
5/01 pp.12--18; STB Reprints Vol 10, pp.298--307
implementation of Stereotype Ordinal Regression (SOR) which
can be thought of as imposing constraints on a multinomial
model

STB-56 sbe37 . . . . Special restrictions in multinomial logistic regression
(help mclgen, mclest if installed) . . . . . . . . . . . J. Hendrickx
7/00 pp.18--26; STB Reprints Vol 10, pp.93--103
programs for multinomial conditional logit providing greater
flexibility for restrictions on the dependent variable;
including stereotyped ordered regression models and the row
and columns model 2 which contain both linear and multipli-
cative terms


Web resources from Stata and other users

(contacting http://www.stata.com)
no matches

good luck.
-laurel
At 03:56 PM 9/20/2002 +0000, you wrote:

Hi Stata List:

As suggested, I have tried looked up for templates (re: help 'mlogit')
to constraint my earnings estimates in multinomial logit situations.
However, the 'invalid syntax' still keep repeating on my screen.

So, again I am posting my hypothetical example and hoping to get more responses and suggestions from the list:
Dependant variable: PAR
Independent variables: edu, race, earn1, earn2, earn3.
If I want to constraint estimates of my earn variables only, ie.
earn1=earn2=earn3.

What's the appropriate command I shall be using in the multinomial
logit situation?

I have tried template such as:

cons def 1 (par)earn1=earn2
cons def 2 (par)earn2=earn3
mlogit par edu race earn*, cons (1-2)

However, the response I have received is either 'invalid syntax' or earn* is completely 'dropped' from the multinomial logit equation. I am really hoping anyone who have been working on 'constraint' issues could share some their experiences with me, and better if you could offer some suggestions.

Thanks again.

Regards,

Hannah

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Laurel A Copeland, PhD
Data Analyst/Programmer
VA Ann Arbor Medical Center
Health Services Research & Development Field Program
P.O.Box 130170                   // 24 Frank Lloyd Wright
Ann Arbor MI 48113-0170 // Ann Arbor MI 48105
Tel: 734-930-5132
Fax: 734-930-5159

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