- . xtunitroot ips Dlogclose
- Im-Pesaran-Shin unit-root test for Dlogclose
- --------------------------------------------
- Ho: All panels contain unit roots Number of panels = 484
- Ha: Some panels are stationary Avg. number of periods = 377.58
- AR parameter: Panel-specific Asymptotics: T,N -> Infinity
- Panel means: Included sequentially
- Time trend: Not included
- ADF regressions: No lags included
- ------------------------------------------------------------------------------
- Fixed-N exact critical values
- Statistic p-value 1% 5% 10%
- ------------------------------------------------------------------------------
- t-bar -15.6475 (Not available)
- t-tilde-bar -11.9481
- Z-t-tilde-bar -2.8e+02 0.0000
- ------------------------------------------------------------------------------
我做的是收益率的面板数据的平稳性检验,共有484只个股,结果如上,我想问的是:
1、这个结果是表示序列是平稳的吗?P值是零,但是 t-bar 、 t-tilde-bar 的P值没有显示,是不是省略了
2、 (Not available)表示是什么意思?
t-bar 、 t-tilde-bar、 Z-t-tilde-bar 大概的计算是怎么个思路,
非常感谢人大提供这个平台,也感谢回答问题的各位。


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