为啥我做出来,t 值和p值那里是空白。
ipshin lp,lags(1)
Im-Pesaran-Shin test for cross-sectionally demeaned lp
Deterministics chosen: constant
t-bar test, N,T = (67,5) Obs = 201
Augmented by 1 lags (average)
t-bar cv10 cv5 cv1 W[t-bar] P-value
. -1.770 -1.840 -2.000 . .