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From |
Richard Williams <richardwilliams.ndu@gmail.com> |

To |
statalist@hsphsun2.harvard.edu, statalist@hsphsun2.harvard.edu |

Subject |
Re: st: gologit2 and mlogit coefficients do not agree |

Date |
Sun, 12 Feb 2012 20:12:08 -0500 |

At 07:54 PM 2/12/2012, Rauscher, Garth wrote:

Dear listservers, I am unable to reproduce the coefficients that I obtain from mlogit when I attempt to run the same model in gologit2. As a simplified example of the problem, my dependent variable (Y) has 3 categories (0,1,2) and I have a single binary independent variable X (0,1). Mlogit gave me the same result I obtained when I ran separate logistic regressions comparing Y=1 and Y=2 separately with Y=0, but gologit2 did not. My results are below. At first I thought that gologit2 might be giving the inverse of mlogit but that is not the case. I like the flexibility of gologit2 but am not sure how to interpret it's results.

http://www.nd.edu/~rwilliam/gologit2/index.html http://www.nd.edu/~rwilliam/gologit2/tsfaq.html

use "http://www.indiana.edu/~jslsoc/stata/spex_data/ordwarm2.dta";, clear gologit2 yr89 male white age ed prst mlogit yr89 male white age ed prst

Thanks for listening, Garth . mlogit y x , rrr baseoutcome(2) Multinomial logistic Number of obs = 730 LR chi2(2) = 25.52 Prob > chi2 = 0.0000 Log likelihood = -754.39125 Pseudo R2 = 0.0166 ------------------------------------------------------- y | RRR Std. Err. z P>|z| -------------+----------------------------------------- 0 x | .3853242 .1040091 -3.53 0.000 1 x | .3950005 .0858599 -4.27 0.000 2 | (base outcome) ------------------------------------------------------- . gologit2 y x, npl or Generalized Ordered Logit Number of obs = 730 LR chi2(2) = 25.52 Prob > chi2 = 0.0000 Log likelihood = -754.39125 Pseudo R2 = 0.0166 ------------------------------------------------------- y | Odds Ratio Std. Err. z P>|z| -------------+----------------------------------------- 0 x | 1.822296 .4744057 2.31 0.021 1 x | 2.554348 .4826326 4.96 0.000 ------------------------------------------------------- Garth H Rauscher Associate Professor of Epidemiology UIC School of Public health (312)413-4317 garthr@uic.edu * * 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/

**References**:**st: gologit2 and mlogit coefficients do not agree***From:*"Rauscher, Garth" <garthr@uic.edu>

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