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Re: st: RE: Areg, absorb


From   emanuele mazzini <madsoenistata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: Areg, absorb
Date   Mon, 11 Apr 2011 16:12:15 +0200

I may have find it out with the xi command, which sounds better. And i
also guess that later on I can export from the table I obtain only
some variables (the relevant ones) rather than all of them, thus
excluding the estimates of the dummies. Am I right?

Thank you.
Emanuele.

2011/4/11 Nick Cox <njcoxstata@gmail.com>:
> So identifier is "country1 country2" and time variable "year"? Well,
> then -group(country1 country2 year)- will define a distinct (and
> unique) value for each observation, which is far too many dummies.
>
> Nick
>
> On Mon, Apr 11, 2011 at 2:48 PM, emanuele mazzini
> <madsoenistata@gmail.com> wrote:
>
>> Exactly country1 country2 and year.
>>
>> 2011/4/11 Nick Cox <njcoxstata@gmail.com>:
>>> Everything depends on whether you want dummies for _combinations_ of
>>> -country1-, -country2- and -year-.
>>>
>>> What precisely defines a panel?
>>>
>>> Nick
>>>
>>> On Mon, Apr 11, 2011 at 1:30 PM, emanuele mazzini
>>> <madsoenistata@gmail.com> wrote:
>>>
>>>> I tried that but doesn't really work. Curiously, Stata reports
>>>> insufficient observations. That's kind of strange, however.
>>>>
>>>> 2011/4/11 Jan Bryla <JBR@finansraadet.dk>:
>>>>> Would it not be possible for you to first generate group id's based on country1 country2 and year, and then use -areg- to control for each group? I think that would capture the desired effects.
>>>>>
>>>>> In that case it would be something like:
>>>>>
>>>>> Egen id=group(country1 country2 year)
>>>>> Areg ..., abs(id)
>>>>>
>>>>> /Jan Bryla
>>>>>
>>>>>
>>>>> -----Original Message-----
>>>>> From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of emanuele mazzini
>>>>> Sent: 11. april 2011 13:33
>>>>> To: statalist@hsphsun2.harvard.edu
>>>>> Subject: st: Areg, absorb
>>>>>
>>>>> Dear all Stata users,
>>>>>
>>>>> I am trying to work out a regression with panel data in which I have
>>>>> to control for country1, country2 and year.
>>>>> I tried to ran a regression after creating a dummy for all three of
>>>>> them and obviously in the result Stata reports the estimates of all
>>>>> the dummies I created which I do not want to show in the output of the
>>>>> regression. I tried to get the same result with the command: areg...,
>>>>> absorb(varname)  but the point is that areg does not allow me to
>>>>> include more than one variable, and in this case I would need three.
>>>>> Hence, my brief question is: is there a way to include in the
>>>>> regression the fixed effects for country1, country2 and year without
>>>>> Stata showing all the coefficients of the dummies I create?
>
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