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st: xtwest command


From   "[email protected]" <[email protected]>
To   [email protected]
Subject   st: xtwest command
Date   Sat, 26 Mar 2011 10:49:18 +0100 (CET)

Dear All,
               I'm working with a panel dataset. Could anyone help me in 
interpreting the four
statistics that Stata give after the xtwest command (Westerlund ECM panel 
cointegration tests)?
Here, there my results:


Results for H0: no cointegration
With 20 series and 1 covariate

-----------------------------------------------+
Statistic |   Value   |  Z-value  |  P-value  |
-----------+-----------+-----------+-----------|
     Gt    |   -1.479  |    4.884  |   1.000   |
     Ga    |  -12.464  |   -0.380  |   0.352   |
     Pt    |   -5.922  |    4.108  |   1.000   |
     Pa    |  -10.268  |   -0.984  |   0.163   |
-----------------------------------------------+

How I should consider the Gt, Ga, Pt and Pa statistics?

Best Regards,
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