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st: general panel data regression question


From   "Terra Curtis" <terra.curtis@cambridgefinance.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: general panel data regression question
Date   Mon, 15 Aug 2005 13:13:34 -0400

Dear Statalisters,

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.

Thanks,
Terra

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