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Re: st: error i ( ) required r (198)


From   "Seema Bhatia" <ler02sb@reading.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   Re: st: error i ( ) required r (198)
Date   Wed, 1 Aug 2007 12:00:36 +0100

Thank you for the reply Mike!

Regards

Seema
----- Original Message -----
From: "Mike Bader" <mikebader9@gmail.com>
To: <statalist@hsphsun2.harvard.edu>
Sent: Tuesday, July 31, 2007 6:51 PM
Subject: Re: st: error i ( ) required r (198)


> Seema,
>
> Others can correct me if I am wrong, but I believe that you need to
> set the variable of the groups across which you are comparing,
> otherwise Stata doesn't know how to group the outcomes to measure the
> fixed effects.
>
> You can either add the option i(<grp_varname>) to the end of the command
> [i.e. xtreg lngdpimp lngdpexp lnpopimp lnpopexp ldist, fe
> i(<grp_varname>)]
>
> or set the group variable using:
> iis <grp_varname>
> which will set the group variable for all future xt commands.
>
> mike
>
> On 7/31/07, Seema Bhatia <ler02sb@reading.ac.uk> wrote:
>> Hello there
>>
>> I am trying to do a hausman test in stata using my dataset and i keep
>> getting the following message
>> i () required
>> r (198)
>>
>> (the command line is
>> xtreg lngdpimp lngdpexp lnpopimp lnpopexp ldist, fe)
>>
>> This has something to do with the syntax but what am I doing wrong? No
>> matter what I change, I keep getting the message
>>
>> Please help
>>
>> Thanks
>>
>> Seema
>>
>>
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