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st: xtpoisson -- error
From
Ivan Png <[email protected]>
To
[email protected]
Subject
st: xtpoisson -- error
Date
Tue, 15 Nov 2011 07:01:24 +0800
Dear STATAlist:
I'm running xtpoisson and keep encountering an error message
"factor variables and time-series operators not allowed in option xvars()"
My code:
. global explvar bkval_ln mktval_ln revt_ln at_ln
. global fixedeff i.sic i.year
. set matsize 1000
. xtset gvkey year
. xi: xtpoisson move cnc_alt $explvar $fixedeff , fe i(gvkey) vce(robust)
I'm using STATA-11. It runs through about 12 iterations then stops,
giving me the error message,
""factor variables and time-series operators not allowed in option xvars()".
I would appreciate your help.
--
Best wishes
Ivan Png
National U of Singapore
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