Re: st: dropping dummies variables

["ALICE DOBSON" <alice_dobson@hotmail.com>]

YOU WERE SO RIGHT! THANKS


> From: Seb Buechte <sfbuechte@gmail.com>
> Reply-To: statalist@hsphsun2.harvard.edu
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: dropping dummies variables
> Date: Tue, 30 Aug 2005 13:49:14 +0200
>
> It looks like your missing out the " : " after the xi. It should read:
>
> xi: regress y i.dummy
>
> where dummy is your categorical  variable.
>
> Sebastian
>
> On 8/30/05, ALICE DOBSON <alice_dobson@hotmail.com> wrote:
> > Hi Statalisters,
> > I have a similar problem. The stata command to create a categorical 
> variable
> > is xi i.variable
> > I have some very large categorical variables with around 50 categories
> > When I use a regression command I drag and drop each category to the 
> command
> > line
> > for instance xtreg sales market1 market2 market 3 .........
> > In such case I get the estimates
> > However, when I use the command
> > xi xtreg sales i.market it just creates the dummies
> >
> > Best,
> > Alice
> >
> >
> >
> >
> > >From: Seb Buechte <sfbuechte@gmail.com>
> > >Reply-To: statalist@hsphsun2.harvard.edu
> > >To: statalist@hsphsun2.harvard.edu
> > >Subject: Re: st: dropping dummies variables
> > >Date: Tue, 30 Aug 2005 10:02:55 +0200
> > >
> > >Federica,
> > >
> > >posting the same mail twice or even three times will not increase the
> > >number of responses. As I pointed out earlier you may have to post
> > >some of your code and some of you data, so someone who wants to can
> > >actually help you.
> > >
> > >Kind regards,
> > >sebastian
> > >
> > >On 8/30/05, Federica Demaria <fede.dem@libero.it> wrote:
> > > > > Dear all,
> > > > > I have a panel of 7 countries, identified by the variable id. When 
> I
> > >run the following regression
> > > > > xi: reg y x1 x2 i.year i.id
> > > > > as expected, Stata omits the first dummy of both the id and year 
> sets
> > >of dummies.
> > > > > The strange thing is that it also drops another dummy variable of 
> both
> > >the mentioned sets of dummies, but it uses in the estimation the
> > >corresponding country and year.
> > > > > Could you please help me in understanding the reason behind this
> > >dropping?
> > > > > thank you in advance
> > > > > Federica
> > > > > Department of Economics anad Statistics
> > > > > University of Calabria
> > > > >
> > > > >
> > > > >
> > > > >
> > >
> >
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> >
>
>
> --
> - Seb F Buechte
> -
> - Stay tuned!
>
> *
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