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Re: st: Problems with calculating marginal effects for categorical variables in ologit models


From   "Joao Ricardo F. Lima" <jricardofl@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Problems with calculating marginal effects for categorical variables in ologit models
Date   Tue, 22 Apr 2008 08:31:05 -0300

Eva,

or then

margeff, dummies(d*)

because he said "D are all dummies for which you want to calculate the marginal
> effects" not B.

Best,

Joao Lima


2008/4/22, Eva Poen <eva.poen@gmail.com>:
> I cannot reproduce your problem using the auto data (see example
> below). Btw, it's unlikely that you have literally typed -Margeff,
> dummies (B *)-. Instead, you probably wrote
> -margeff, dummies(B*)-.
>
> Also, you said "D are all dummies for which you want to calculate the marginal
> effects". The option -dummies- does not mean that marginal effects
> will be calculated only for these variables. The option ensures that,
> for the process of calculating marginal effects, only one of the
> dummies will be set equal to 1, while all others are set to 0.
>
> If you send the exact code of your ologit model and the margeff
> command to the list, people will be more likely to help.
>
> Eva
>
> ** example
> sysuse auto, clear
> tab headroom, gen(hr) /* create dummies */
> ologit rep78 foreign  hr1 hr2 hr3 hr4 hr5 hr6 hr7
> margeff, dummies(hr*)
> ** end of example
>
>
>
>
> 2008/4/22, MANUELFERN.FLORES@rai.usc.es <MANUELFERN.FLORES@rai.usc.es>:
> > Dear users,
> >
> >  My question is following one: I do not know how to calculate average
> > marginal effects (AME) for categorical variables with more than two
> > categories?
> >  In my ordered logit model, I have a dependent variable with 4 categories
> > and 5 categorical explanatory variables, 3 of them with more than two
> > categories. I tried to implement the method of Tamás Bartus which is
> > decribed in his article "Estimation of marginal effects using margeff"
> > (2005). His suggestion is to use the following command:
> >  Margeff, dummies (B *)
> >  where D are all dummies for which you want to calculate the marginal
> > effects.
> >  The problem is that by trying to do this I got the following error:
> > "[_cut1] not found" r(111)
> >
> >  I would appreciate very much any suggestions.
> >
> >  *
> >  *   For searches and help try:
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> >  *   http://www.stata.com/support/statalist/faq
> >  *   http://www.ats.ucla.edu/stat/stata/
> >
>
> *
> *   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/
>


-- 
-------------------------------
Joao Ricardo Lima
Professor
UFPB-CCA-DCFS
+553138923914
-------------------------------

*
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*   http://www.ats.ucla.edu/stat/stata/



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