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


From   "Lina Jonsson" <lina.jonsson@vti.se>
To   <statalist@hsphsun2.harvard.edu>
Subject   SV: st: Problems with calculating marginal effects for categorical variables in ologit models
Date   Wed, 23 Apr 2008 13:38:57 +0200

Eva,

When I updated margeff it works! But I downloaded the margeff package just a few hours ago after searching for margeff using the search command in Stata. Next time I want to download a package, should I download it from someplace else to get the latest version? 

Thank you!

And also thanks to Richard Williams that also suggested to update which I then didn´t try since I just had downloaded the package

/Lina
 

> -----Ursprungligt meddelande-----
> Från: owner-statalist@hsphsun2.harvard.edu 
> [mailto:owner-statalist@hsphsun2.harvard.edu] För Eva Poen
> Skickat: den 23 april 2008 11:23
> Till: statalist@hsphsun2.harvard.edu
> Ämne: Re: st: Problems with calculating marginal effects for 
> categorical variables in ologit models
> 
> 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 It might be out of date.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 <lina.jonsson@vti.se>:
> > 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-----
> >  > Från: owner-statalist@hsphsun2.harvard.edu
> >  > [mailto:owner-statalist@hsphsun2.harvard.edu] För Joao 
> Ricardo F. 
> > Lima  > Skickat: den 22 april 2008 13:31  > Till: 
> > statalist@hsphsun2.harvard.edu  > Ämne: 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 <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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> >  > > >
> >  > >
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> >  > >
> >  >
> >  >
> >  > --
> >  > -------------------------------
> >  > Joao Ricardo Lima
> >  > Professor
> >  > UFPB-CCA-DCFS
> >  > +553138923914
> >  > -------------------------------
> >  >
> >  > *
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> >  >
> >
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> >
> 
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