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st: Thanx for -mfx-


From   "Clive Nicholas" <Clive.Nicholas@newcastle.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   st: Thanx for -mfx-
Date   Thu, 13 Nov 2003 03:37:12 -0000 (GMT)

Scott,

Excellent stuff! First, I get -net install- (finally) working, now this!

I should have seen -mfx- in [U] 23.13, but didn't!! Thanks very much! :-)

C.

> ----- Original Message -----
> From: "Clive Nicholas" <Clive.Nicholas@newcastle.ac.uk>
> To: <statalist@hsphsun2.harvard.edu>
> Sent: Wednesday, November 12, 2003 5:14 PM
> Subject: Re: st: beginnerXs ask about Xtlogit probabilities
>
>
>> I echo this query for -xtprobit- and -xtgee-, but I daresay that such
>> neat
>> commands do not yet exist in Stata 8 as they do for -logit-, -probit-,
>> etc. I sincerely hope I'm wrong, because I wouldn't mind using such
>> conversions myself at present!! :-)
>>
>> C.
>>
>> > Hi all Stata users,
>> > as I said in the subject, I am still learnig how to
>> > use stata. Iīm using Xtlogit, fixed effects for
>> > estimating panel data, and I donīt know how to replace
>> > the betas for itīs marginal probabilities. Is there
>> > any command like dprobit for panel dataīs logit?
>> >
>> > Thanks
>> >
>> > best regards,
>> > Nick
>> >
>
>
> -mfx compute- will work after -xtlogit, fe-  with the predict(pu0) option.
>
> The pu0 comes from -clogit- which also estimates conditional fixed-effects
> logit
> models.
>
> For example:
>
> . webuse union
> (NLS Women 14-24 in 1968)
>
> . qui xtlogit union age grade south, fe i(id)
>
> . mfx compute, predict(pu0)
>
> Marginal effects after clogit
>       y  = Pr(union|fixed effect is 0) (predict, pu0)
>          =  .79024722
> ------------------------------------------------------------------------------
> variable |      dy/dx    Std. Err.     z    P>|z|  [    95% C.I.   ]
> X
> ---------+--------------------------------------------------------------------
>      age |   .0028229      .00116    2.44   0.015   .000555  .005091
> 30.538
>    grade |   .0141407      .00312    4.53   0.000   .008019  .020262
> 12.7934
>    south*|  -.1301144      .04335   -3.00   0.003  -.215084 -.045145
> .381388
> ------------------------------------------------------------------------------
> (*) dy/dx is for discrete change of dummy variable from  to 1
>
>
>
> -mfx compute- will also work after -xtprobit- and -xtgee-.
>
>
> Hope this helps,
> Scott
>
>
> *
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>


Yours,
CLIVE NICHOLAS,
Politics Building,
School of Geography, Politics and Sociology,
University of Newcastle-upon-Tyne,
Newcastle-upon-Tyne,
NE1 7RU,
United Kingdom.
*
*   For searches and help try:
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*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



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