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st: RE: xtpcse - "no time periods are common to all panels"
From
Nick Cox <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
st: RE: xtpcse - "no time periods are common to all panels"
Date
Tue, 15 Nov 2011 19:16:27 +0000
Not personally, but if you are right there is a bug in -xtpcse-.
Thus you should give evidence, so that the bug can be identified and fixed.
Note that
1. Crucially, "most" is not "all"; "all" really does mean "all".
2. The -xtpcse- calculation will also exclude observations that are missing on any of your variables, so the question is not just a matter of overlap based on -panel- and -year- in your case.
Nick
[email protected]
Wayne Sandholtz
I have panel data for about 120 countries, unbalanced (the number of
years ranges from 3 to 20). I set it up with "xtset panel year." But
when I try to run -xtpcse- I get this error message: "no time periods
are common to all panels, cannot estimate disturbance covariance matrix
using casewise inclusion." But I know that that the panels do include
common years. Most of the panels include the same 15 - 16 years. Does
anyone have experience with this problem?
Thanks,
Wayne
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