另外
Pedroni 检验 和 Westerlund 检验 都显示 no observations 是怎么回事?
请各位老师、各位大神赐教。
. xtcointtest kao EE elc isai isri ucrate open ucrate
Kao test for cointegration
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Ho: No cointegration Number of panels = 27
Ha: All panels are cointegrated Number of periods = 12
Cointegrating vector: Same
Panel means: Included Kernel: Bartlett
Time trend: Not included Lags: 0.93 (Newey-West)
AR parameter: Same Augmented lags: 1
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Statistic p-value
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Modified Dickey-Fuller t . .
Dickey-Fuller t . .
Augmented Dickey-Fuller t . .
Unadjusted modified Dickey-Fuller t -1.7432 0.0406
Unadjusted Dickey-Fuller t -3.4822 0.0002
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