Table 4.
Robustness of AQI
| AQI_E | ||||||
|---|---|---|---|---|---|---|
| (1) | (2) | Wuhan | Chengdu | Zhengzhou | Taiyuan | |
| E |
− 0.5287 (5.1106) |
− 14.6474*** (4.7828) |
− 11.2752** (4.4422) |
26.9558*** (9.5880) |
− 12.1640 (11.0530) |
− 11.1972 (9.1531) |
| N | 840 | 627 | 210 | 213 | 207 | 210 |
| R2 | 0.3753 | 0.3801 | 0.4748 | 0.5524 | 0.4436 | 0.4067 |
Note: (1) is the full sample regression result and (2) deletes the data of Chengdu. *, **, and *** respectively indicate significance levels of 10%, 5%, 1%