| 检验方法 | AGDP | INTA | D_AGDP | D_INTA |
| IPS | 0.2806 | −0.4237 | −1.8743** | −3.7092*** |
| (0.6105) | (0.3359) | (0.0304) | (0.0001) | |
| LLC | −5.9889*** | −8.6989*** | −9.8742*** | −13.0173*** |
| (0.0000) | (0.0000) | (0.0000) | (0.0000) |