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st: RE: Why is some observations lost when specifying bw(1) in xtivreg2


From   "Schaffer, Mark E" <M.E.Schaffer@hw.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Why is some observations lost when specifying bw(1) in xtivreg2
Date   Fri, 12 May 2006 18:54:56 +0100

David, 

> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu 
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of 
> David Granlund
> Sent: 12 May 2006 15:38
> To: statalist@hsphsun2.harvard.edu
> Subject: st: Why is some observations lost when specifying 
> bw(1) in xtivreg2
> 
> I have a sample of 910 observations, 91 groups and 10 years, 
> without any missing data. When I estimate a robust fixed 
> effect model the Number of obs is correctly reported as 910, 
> but when I also specify bw(1) the Number of obs is reported 
> to be 842. Can someone help me with an explanation to this?

This came up on the list earlier this week:

http://www.stata.com/statalist/archive/2006-05/msg00295.html

Cheers,
Mark

> Thank you in advance for your help!
> 
> Regards,
> David Granlund
> 
> 
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