Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

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


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/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index