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st: RE: general panel data regression question


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: general panel data regression question
Date   Mon, 15 Aug 2005 22:19:07 +0100

Check the pattern of missing values. 

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

Terra Curtis
 
> I am running a series of linear regression models using panel data on
> several companies over a period of years.  Before the 
> regression is run, I
> have 2678 observations (2678 lines of data in the browser).  
> When I run the
> first regression, Stata reports number of obs = 819.  Why the 
> discrepancy?  
> 
> I am inclined to think it has something to do with the fact 
> that I have
> -tsset- my data, but I'm not very familiar with panel data so any
> clarification would be greatly appreciated.

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