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st: RE: RE: TSSET


From   "Landman, Todd" <todd@essex.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: TSSET
Date   Tue, 8 Jul 2003 16:20:00 +0100

Thanks Nick.  Some of the panel variables had missing 
> values since no one has assigned country id numbers to some 
> of the countries. Removing them made tsset work, but the 
> xtivreg estimates were the same.
> 
> Cheers,
> 
> Todd

-----Original Message-----
From: Nick Cox [mailto:n.j.cox@durham.ac.uk]
Sent: 08 July 2003 15:53
To: statalist@hsphsun2.harvard.edu
Subject: st: RE: TSSET


Landman, Todd
> 
> I have a time series panel data set of 169 contries from 
> 1976-2000.  When I use tsset to prepare to use xtivreg, I 
> get an error message saying that I have repeated time 
> values within the panel, but all the panels (i.e. 
> countries) run from 1976-2000.  How do I get tsset to work 
> properly? Or can I use iis for the country var and tis for 
> the time var?

-iis- and -tis- are more or less the same 
procedure as -tsset-. Going in the front door
and going in the back door get you into the 
same house. There are nuances of difference, but they 
do not seem pertinent here. 

To conVince yourself of this, see 

http://www.stata.com/support/faqs/stat/tsset.html

My guess is that your data are not as you 
think they should be. -duplicates- is one of 
several possible tools for finding repeated
values. There are others, but that may help. 

Nick 
n.j.cox@durham.ac.uk 
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