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st: problem with Levin-Lin-Chu test and the Im-Pesaran-Shin test in stata 12
From
sabbas gidarokostas <[email protected]>
To
[email protected]
Subject
st: problem with Levin-Lin-Chu test and the Im-Pesaran-Shin test in stata 12
Date
Sun, 17 Jun 2012 22:53:36 +0100
Dear Statalisters,
I have a balanced panel data set with no missing observations (T=7, N=11 )
I use Stata 12 and i am trying to apply 2 panel unit root tests: the
Levin-Lin-Chu test and the Im-Pesaran-Shin test. But the output is
xtunitroot llc var, lag(aic 8) trend
no observations
r(2000);
I use the usual commads
sort id year
tsset id year
I searched the stata archive but although this problem has been
mentioned before, I still can not find any solution. As I said I have
a balanced panel and no missing observations. the time period is from
2002-2008
Any suggestions?
thanks in advance
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