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st: Standard Errors: regress vs. xtreg
From
Raphael Fraser <[email protected]>
To
[email protected]
Subject
st: Standard Errors: regress vs. xtreg
Date
Mon, 3 Oct 2011 18:13:48 -0400
I am fitting the following models expecting to get the same standard
errors but they are slightly different. Can some one explain the
reason for this?
xi, noomit: regress logsize i.days ozone dayXozone if year == 88, noconstant
xi, noomit: xtgee logsize i.days ozone dayXozone if year == 88,
noconstant corr(independent)
Thanks,
Raphael
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