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From |
"Valle, Giuseppina" <gv08d@my.fsu.edu> |

To |
"statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |

Subject |
RE: st: RE: RE: predicted probabilities of interaction term |

Date |
Wed, 18 Jul 2012 21:17:39 +0000 |

Yes, this is exactly what I was looking to accomplish -- thanks for the help! Pina Giuseppina Valle, M.S. Department of Sociology Doctoral Candidate Florida State University 526 Bellamy Building Tallahassee, FL 32306-2240 Email: gv08d@my.fsu.edu ________________________________________ From: owner-statalist@hsphsun2.harvard.edu [owner-statalist@hsphsun2.harvard.edu] on behalf of Richard Williams [richardwilliams.ndu@gmail.com] Sent: Wednesday, July 18, 2012 1:26 PM To: statalist@hsphsun2.harvard.edu; statalist@hsphsun2.harvard.edu Subject: Re: st: RE: RE: predicted probabilities of interaction term At 10:49 AM 7/18/2012, Valle, Giuseppina wrote: >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. If you want to get predicted values for individual cases use the -predict- command. If, on the other hand, you want to get predicted probabilities for certain combinations of values, check out the margins command. e.g. do something like webuse nhanes2f,clear svy: mlogit health i.sex##i.race age margins race#sex, predict(outcome(1)) atmeans margins race#sex, predict(outcome(2)) atmeans margins race#sex, predict(outcome(3)) atmeans margins race#sex, predict(outcome(4)) atmeans margins race#sex, predict(outcome(5)) atmeans I believe that would more or less clone what -prtab- does, although I personally might drop the -atmeans- option. The margins command is powerful but complicated (and also a little tedious with multiple outcome commands like mlogit). The current issue of the Stata Journal has an article on it, and there is also a handout at http://www.nd.edu/~rwilliam/stats/Margins01.pdf >Pina > >Giuseppina Valle, M.S. >Department of Sociology >Doctoral Candidate >Florida State University >526 Bellamy Building >Tallahassee, FL 32306-2240 > >Email: gv08d@my.fsu.edu > >________________________________________ >From: owner-statalist@hsphsun2.harvard.edu >[owner-statalist@hsphsun2.harvard.edu] on behalf of William Buchanan >[william@williambuchanan.net] >Sent: Tuesday, July 17, 2012 5:11 PM >To: statalist@hsphsun2.harvard.edu >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. > >HTH, >Billy > > >-----Original Message----- >From: owner-statalist@hsphsun2.harvard.edu >[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Valle, Giuseppina >Sent: Tuesday, July 17, 2012 1:38 PM >To: statalist@hsphsun2.harvard.edu >Subject: st: predicted probabilities of interaction term > >Hello, >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 > >* >* 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/ > > > >* >* 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/ ------------------------------------------- Richard Williams, Notre Dame Dept of Sociology OFFICE: (574)631-6668, (574)631-6463 HOME: (574)289-5227 EMAIL: Richard.A.Williams.5@ND.Edu WWW: http://www.nd.edu/~rwilliam * * 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/

**Follow-Ups**:**st: xt commands for parallel growth curves***From:*Alan Acock <acock@mac.com>

**References**:**st: predicted probabilities of interaction term***From:*"Valle, Giuseppina" <gv08d@my.fsu.edu>

**st: RE: predicted probabilities of interaction term***From:*"William Buchanan" <william@williambuchanan.net>

**st: RE: RE: predicted probabilities of interaction term***From:*"Valle, Giuseppina" <gv08d@my.fsu.edu>

**Re: st: RE: RE: predicted probabilities of interaction term***From:*Richard Williams <richardwilliams.ndu@gmail.com>

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