| 变量 | IPS | Fisher-PP | Fisher-ADF |
| LDER | −10.62*** | 79.15** | 32.66 |
| LINV | −5.35*** | 110.27* | 88.65*** |
| LTEC | −3.56 | 35.61 | 32.21 |
| LENS | −4.92*** | 115.63*** | 128.36*** |
| LDEP | −7.53*** | 122.75*** | 132.67*** |
| LURB | −5.57*** | 133.34*** | 145.83*** |
| LPRI | −4.62*** | 115.34*** | 129.52*** |
| LPRI | −4.62*** | 115.34*** | 129.52*** |