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From |
jverkuilen <jverkuilen@gc.cuny.edu> |

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

Subject |
RE: st: Conditional multinomial logistic regression again |

Date |
Fri, 14 Nov 2008 12:11:28 -0500 |

Yes, there are at least three options in SAS: (1) proc mdc found in SAS/ETS. There might be other SAS/ETS procs that do it but mdc fits all manner of multinomial choice models. (2) There is a way to trick the Cox PH program to do it by setting up the data in "super long" format akin to the way Poisson regression can be used to fit a discrete time survival model. It is just a guess but I suspect you'll find an example in the well-known Agresti 2002 categorical book. I know there is an example on Carolyn Anderson's (UIUC Ed Psych/Stat/Psych) web page under her ategorical data class. (Am on handheld so I can't give better references but "the" Google should turn up what you need.) (3) You can also use proc nlp (in SAS/OR) to code up the likelihood function. -----Original Message----- From: "Elizabeth Allred" <lizard@hsph.harvard.edu> To: statalist@hsphsun2.harvard.edu Sent: 11/14/2008 11:22 AM Subject: st: Conditional multinomial logistic regression again Having gotten no responses to my earlier query (below), I went over to the dark side (SAS) to see what it could/would do. Using proc logistic, I can fit a conditional <binary> logistic (like clogit) and a multinomial logistic (like mlogit) but SAS, too, will not fit a conditional multinomial logistic. SAS says: NOTE: Conditional logistic regression with polytomous response data is not currently supported. Will it ever be? I'm not a programming whiz..am I asking for something impossible? Is there no way to do conditional multinomial logistic regression?? Liz >>> On 11/13/2008 at 3:42 PM, in message <491C4AAA.6A77.00DF.0@hsph.harvardedu>, Elizabeth Allred <lizard@hsph.harvard.edu> wrote: > I've used clogit (conditional [fixed-effects] logistic regression but it only > deals with a binary dependent variable. Now I have a dependent variable with > 3 levels. Mlogit (multinomial logistic regression) handles that but doesn't > it doesn't do for the fixed effects. How can I do condtional multinomial > logistic?? > > Liz > * * 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/

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