| 检验方法 | 统计 | 统计值 | Prob. |
| Kao检验 | ADF | −0.874435 | 0.0000 |
| Pedroni检验 | Panel PP-Statistic | −8.187902 | 0.0000 |
| Panel ADF-Statistic | −3.082688 | 0.0010 | |
| Group PP-Statistic | −15.80515 | 0.0000 | |
| Group ADF-Statistic | −6.088774 | 0.0010 |