> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of Sunil W
> Sent: Tuesday, November 30, 2004 12:00 PM
> To: [email protected]
> Subject: st: fixed effects and random effects
<snip>
> Two, I have an unbalanced panel data in which the
> number of observations per firm ranges from 1 to 60.
> Would this lead to any bias in my fixed effects
> estimates, especially since some firms have only 1
> observation? If so, how do I get around the problem?
>
No, it is not a problem. Singletons provide information about the constant,
the variance components, the between R-sq, the overall R-sq and the
correlation between the u_i and xb.
See David Drukker's post at:
http://www.stata.com/statalist/archive/2002-07/msg00311.html
Hope this helps,
Scott
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