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st: RE: RE: predicted probabilities of interaction term

From   "Valle, Giuseppina" <[email protected]>
To   "[email protected]" <[email protected]>
Subject   st: RE: RE: predicted probabilities of interaction term
Date   Wed, 18 Jul 2012 15:49:08 +0000

Thank you for your help -- I was unaware that I needed to use the subpop command when looking at the gender differences with the svy command. In terms of the postestimation commands, I have not located any syntax available that will produced predicted probabilities of the interaction terms with a mlogit. I have 4 values for "race" and 3 values for "relig." I assume that using prtab along with specified values of these two variables would not produce the estimates I am looking for, as that is the only command I have used for predicted probabilities.


Giuseppina Valle, M.S.
Department of Sociology
Doctoral Candidate
Florida State University
526 Bellamy Building
Tallahassee, FL 32306-2240

Email:   [email protected]

From: [email protected] [[email protected]] on behalf of William Buchanan [[email protected]]
Sent: Tuesday, July 17, 2012 5:11 PM
To: [email protected]
Subject: st: RE: predicted probabilities of interaction term

Hi Giuseppina,

One suggestion that I have would be to use the -subpop()- option of the
-svy:- prefix.  This is something that surfaces on the Statalist regularly,
although it may not be an issue in your specific case.  Either way, the help
file for -svy- includes the following line:

"Warning:  Using if or in restrictions will often not produce correct
variance estimates for
      subpopulations.  To compute estimates for subpopulations, use the
subpop() option."

With regards to your other question, I would look at -help mlogit
postestimation- to get an idea of what is already available in Stata to
calculate the predicted probabilities of the outcome after a multinomial
logit model.


-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Valle, Giuseppina
Sent: Tuesday, July 17, 2012 1:38 PM
To: [email protected]
Subject: st: predicted probabilities of interaction term

I was wondering how to run predicted probabilities for a multinomial
regression with an interaction term.

Here is the syntax I am using:

svy: mlogit timing pledge sexed i.race i.relig i.race#i.relig ///
        wave4age stepfam singlemo singleda other HSdeg somecoll ///
        colldeg misseduc lowmidinc highmidinc highinc missinc ///
        midwest south northeast if gender==0,  ///
        rrr baseoutcome(2) nolog

I would appreciate any suggestions. Thanks!

Giuseppina Valle

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