核心解释变量:lnPM | ||||||
门槛变量 | 门槛效应 | F值 | P值 | 临界值 | ||
90% | 95% | 99% | ||||
lner | 单一门槛 | 70.86** | 0.0175 | 41.5287 | 49.5535 | 88.1868 |
双门槛 | 13.14 | 0.6225 | 33.9635 | 43.8415 | 77.5539 | |
三门槛 | 14.82 | 0.5250 | 31.3054 | 40.1755 | 48.8888 | |
lnpgdp | 单一门槛 | 770.23*** | 0.0000 | 32.6019 | 40.1105 | 57.0408 |
双门槛 | 369.16** | 0.0300 | 52.4391 | 64.1934 | 765.1101 | |
三门槛 | 158.25 | 0.3000 | 294.7220 | 367.6464 | 450.9242 |