|
| (1) | (2) | (3) | (4) | (5) | (6) |
|
| lnAQI | lnPM2.5 | lnNO2 | lnSO2 | lnCO | lnO3 |
| DID | −0.061** | −0.056 | −0.044 | −0.082** | −0.021 | 0.076* |
| (−2.100) | (−1.618) | (−1.096) | (−2.048) | (−1.092) | (1.908) | |
| 城市固定效应 | Y | Y | Y | Y | Y | Y |
| 时间固定效应 | Y | Y | Y | Y | Y | Y |
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| 控制变量 | Y | Y | Y | Y | Y | Y |
| _cons | 4.090** | 2.934 | 6.840*** | 0.764 | 1.849 | 6.867*** |
| (2.298) | (1.376) | (2.772) | (0.312) | (1.598) | (2.834) | |
| N | 273 | 273 | 273 | 273 | 273 | 273 |