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From |
"Timothy Dang" <tpondang@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: -clogit-, -asclogit- and marginal effects |

Date |
Mon, 29 Oct 2007 13:05:37 -0700 |

Richard- Thanks for the reply. Just to be clear, you're saying that the marginal effects computed by -estat mfx- after -aclogit- should be correct because they're computed analytically? In any case, I'm pretty sure at this point that I'm better off computing the marginal effects myself. > Computing things at the mean of the data is pretty useless in my case, so I'm going to compute the means of the marginal effects. Speaking of which, I wrote: > Possibly related, The probabilities given: > Pr(choice = 0|1 selected) = .03259311 > Pr(choice = 1|1 selected) = .00072116 > Pr(choice = 2|1 selected) = .85932034 > Pr(choice = 3|1 selected) = .10736539 > > ...don't match the data at all. In fact, the fractions in the data are: > choice = 1: .3059211 > choice = 2: .3695175 > choice = 3: .3190789 This is for the same reason, the probabilities given were the predicted probabilities at the mean of the data, rather than the mean of the predicted probabilities. Thanks -Timothy ------------------------------ Timothy O'Neill Dang / Cretog8 623-587-0532 One monkey don't stop no show. * * 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/

**References**:**Re: st: -clogit-, -asclogit- and marginal effects***From:*rgates@stata.com (Richard Gates)

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