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Panel Unit Root Tests-Choi Test

Posted: Thu Jan 31, 2013 8:10 am
by rehmansargodha
Hellow

Can any one guide why the following message appear in PP-Choi test

Method Statistic Prob.**
PP - Fisher Chi-square 0.00942 1.0000
PP - Choi Z-stat NA

Test statistic value of 'NA' due to the present of a p-value of
one or zero


Thanks

Rehman