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From |
ckang2@gmail.com |

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

Subject |
st: Predicted Probability after xtgee (urgent!!!) |

Date |
Thu, 19 Jul 2007 01:39:18 -0400 |

Dear STATA listers Could you anyone teach me how to get predicted probability after running xtgee? With searching the archives, some reconmmend to use mfx. But since I'm beginner of STATA, I could not figure out and interpret the results, and it looks more like odd ratio, not predicted probability. For example, these are the results actually I got by running mfx after xtgee. arginal effects after xtgee y = xb (predict) = .05777175 ------------------------------------------------------------------------------ variable | dy/dx Std. Err. z P>|z| [ 95% C.I. ] X ---------+-------------------------------------------------------------------- x1 | .002552 .00662 0.39 0.700 -.010432 .015536 .580848 x2 | 1.88e-09 .00000 1.79 0.073 -1.8e-10 3.9e-09 304447 x3 | -.0156874 .00523 -3.00 0.003 -.02593 -.005445 .564654 x4 | -.0145082 .00677 -2.14 0.032 -.027772 -.001244 .332159 x5 | -.0227091 .00653 -3.48 0.001 -.035508 -.00991 .180099 x6 | .5816271 .0339 17.16 0.000 .515188 .648067 .02012 x7 | .0449566 .01105 4.07 0.000 .023306 .066608 .380295 x8 | .1685375 .02724 6.19 0.000 .115158 .221917 .016841 x9 | .0713164 .01873 3.81 0.000 .034603 .10803 .220498 x10 | -.0024053 .0095 -0.25 0.800 -.021029 .016218 .550549 ------------------------------------------------------------------------------ (*) dy/dx is for discrete change of dummy variable from 0 to 1 My quesitons here are three. 1) how is it possible that x2's dy/dx is over 1? I think dy.dx is odd ratio. Am I right? 2) what does "X" in the last column of the first raw mean? 3) is there any other way (STATA command like "prvalue" or "estsimp") to get predicted probability varying across the change of x (I.v.)? Thank you very much for your help and teaching in advance. Charlie. * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: Predicted Probability after xtgee (urgent!!!)***From:*Maarten buis <maartenbuis@yahoo.co.uk>

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