By default, with print.level=0 or greater, the multinomRob program prints the maximum likelihood estimates with conventional standard errors before going on to compute the robust estimates.
Walter Mebane Jasjeet Singh Sekhon writes: > > Hi Roger, > > Yes, multinomRob can handle equality constraints of this type---see > the 'equality' option. But the function assumes that the outcomes are > multinomial counts and it estimates overdispersed multinomial logistic > models via MLE, a robust redescending-M estimator, and LQD which is > another high breakdown point estimator. It would be a simple matter > to edit the 'multinomMLE' function to work without counts and to do > straight MNL instead, but right now it estimates an overdispersed MNL > model. > > Cheers, > Jas. > > ======================================= > Jasjeet S. Sekhon > > Associate Professor > Travers Department of Political Science > Survey Research Center > UC Berkeley > > http://sekhon.berkeley.edu/ > V: 510-642-9974 F: 617-507-5524 > ======================================= > > > > Roger Levy writes: > > I'm interested in doing multinomial logistic regression with equality > > constraints on some of the parameter values. For example, with > > categorical outcomes Y_1 (baseline), Y_2, and Y_3, and covariates X_1 > > and X_2, I might want to impose the equality constraint that > > > > \beta_{2,1} = \beta_{3,2} > > > > that is, that the effect of X_1 on the logit of Y_2 is the same as the > > effect of X_2 on the logit of Y_3. > > > > Is there an existing facility or package in R for doing this? Would > > multinomRob fit the bill? > > > > Many thanks, > > > > Roger > > > > > > -- > > > > Roger Levy Email: [EMAIL PROTECTED] > > Assistant Professor Phone: 858-534-7219 > > Department of Linguistics Fax: 858-534-4789 > > UC San Diego Web: http://ling.ucsd.edu/~rlevy > > > > -- * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * Walter R. Mebane, Jr. email: [EMAIL PROTECTED] Professor office voice: 607/255-3868 Department of Government cell: 607/592-0546 Cornell University fax: 607/255-4530 217 White Hall WWW: http://macht.arts.cornell.edu/wrm1/ Ithaca, NY 14853-7901 * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * - * ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
