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RE: st: help me please,about Stata


From   "Dherani, Mukesh" <M.K.Dherani@liverpool.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: help me please,about Stata
Date   Mon, 28 Jul 2008 14:45:38 +0100

Dear Xiaogang He,
Is <grp_year> panel unique ID? If not then you need to specify unique id here.  

You may also specify unique id using 

iis uniqueid
xtreg lwage black exper, re

see also help xtreg



BW,
mukesh

-----Original Message-----

> Date: Sat Jul 26 19:24:02 PDT 2008
> From: "[gb2312] =?UNKNOWN?B?utjQobjV?=" <hxg@mail.shufe.edu.cn>
> Subject: st: help me please,about Stata
> To: statalist@hsphsun2.harvard.edu
>
> Dear Sir/Madam,
> 
> I am trying to do a test in stata using my panel dataset and I keep
> getting the following message:
>     i () required
>     r (198)
>     (the command line is xtreg lwage black exper, re)
> 
> Then I add the option i(<grp_year>) to the end of the command.(year means from 2001 to 2006),but no matter what I change, I keep getting that message.
> 
> 
> Please help
> 
>  Thanks
> 
> ---------------------------------------------
> Xiaogang He
> Associate Professor and Associate Dean
> 
> School of International Business Administration
> Shanghai University of Finance and Economics
> 777 GuoDing Road, Shanghai 200433, China
> 
> Tel: 86-21-65903670
> Mobile:86-1339114
> 
> 
> 
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