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From |
"Eva Poen" <[email protected]> |

To |
[email protected] |

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

Date |
Wed, 23 Apr 2008 10:23:23 +0100 |

```
Lina,
I cannot reproduce this error. The following example works fine for me
in Stata 9 and 10. -which margeff- returns
*! Version 2.1.7 (10 March 2008)
on my machine.
*** example
sysuse auto, clear
xi: ologit rep78 foreign i.headroom [pweight=price]
margeff
margeff, dummies(_I*)
*** end
If this example doesn't work for you, try updating -margeff-. It might
be out of date. Also, tell us which version of Stata you are using.
Eva
2008/4/23 Lina Jonsson <[email protected]>:
> Hello.
>
> I recieve the same error message when I'm using margeff after ologit.
>
> When entering:
>
> xi: ologit F24 i.SDO i.F17_A [pweight=VIKT] if F24!=6
> margeff, dummies(_I*)
>
>
> I recieve:
>
> [_cut1] not found
> r(111);
>
> But I don't think the problem lies within the dummies option because I recieve the same error message when I'm using the margeff command without specifying , dummies(_I*)
>
> Any ideas what could be the problem?
>
> Best regards
>
> /Lina Jonsson
>
>
>
> > -----Ursprungligt meddelande-----
> > Fr�n: [email protected]
> > [mailto:[email protected]] F�r Joao Ricardo F. Lima
> > Skickat: den 22 april 2008 13:31
> > Till: [email protected]
> > �mne: Re: st: Problems with calculating marginal effects for
> > categorical variables in ologit models
> >
> > 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 <[email protected]>:
> > > 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, [email protected]
> > <[email protected]>:
> > > > 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 Tam�s
> > > > 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:
> > > > * http://www.stata.com/support/faqs/res/findit.html
> > > > * 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
> > -------------------------------
> >
> > *
> > * 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/
> >
>
> *
> * 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/
>
*
* 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**:

**References**:**st: Problems with calculating marginal effects for categoricalvariables in ologit models***From:*[email protected]

**Re: st: Problems with calculating marginal effects for categorical variables in ologit models***From:*"Eva Poen" <[email protected]>

**Re: st: Problems with calculating marginal effects for categorical variables in ologit models***From:*"Joao Ricardo F. Lima" <[email protected]>

**SV: st: Problems with calculating marginal effects for categorical variables in ologit models***From:*"Lina Jonsson" <[email protected]>

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