Ho: All panels contain unit roots           Number of panels  =     30
Ha: At least one panel is stationary        Number of periods =     14

AR parameter:    Panel-specific             Asymptotics: T -> Infinity
Panel means:     Included
Time trend:      Not included               Cross-sectional means removed
Newey-West lags: 2 lags
------------------------------------------------------------------------------
                                  Statistic      p-value
------------------------------------------------------------------------------
Inverse chi-squared(56)   P        79.2006       0.0223
Inverse normal            Z         0.7498       0.7733
Inverse logit t(144)      L*        0.8920       0.8131
Modified inv. chi-squared Pm        2.1922       0.0142
------------------------------------------------------------------------------
P statistic requires number of panels to be finite.
Other statistics are suitable for finite or infinite number of panels.
这个PP检验怎么分析结果?平稳还是不平稳