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


From   David Granlund <david.granlund@econ.umu.se>
To   statalist@hsphsun2.harvard.edu
Subject   st: Why is some observations lost when specifying bw(1) in xtivreg2
Date   Fri, 12 May 2006 16:38:23 +0200

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?

Thank you in advance for your help!

Regards,
David Granlund


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