Table 4.
Double difference results for different air pollutants
| (1) | (2) | (3) | (4) | (5) | (6) | |
|---|---|---|---|---|---|---|
| Dependent variable | ln(AQI) | ln(SO2) | ln(PM2.5) | ln(PM10) | ln(NO2) | ln(CO) |
| ln(Migration)*lockdown | − 0.122*** | − 0.040*** | − 0.131*** | − 0.153*** | − 0.033*** | − 0.033*** |
| (− 9.555) | (− 3.455) | (− 8.388) | (− 10.026) | (− 3.000) | (− 3.567) | |
| Temperature | 0.002*** | 0.001*** | 0.004*** | 0.002*** | 0.002*** | 0.002*** |
| (35.524) | (14.466) | (55.399) | (30.361) | (33.589) | (48.947) | |
| Wind_Direction | − 0.030*** | − 0.049*** | − 0.061*** | − 0.033*** | − 0.045*** | − 0.039*** |
| (− 4.460) | (− 8.320) | (− 7.568) | (− 4.183) | (− 7.817) | (− 8.221) | |
| Wind_Speed | − 0.091*** | − 0.107*** | − 0.203*** | − 0.065*** | − 0.285*** | − 0.080*** |
| (− 13.870) | (− 18.175) | (− 25.447) | (− 8.269) | (− 50.249) | (− 16.908) | |
| Precipitation | − 0.045*** | − 0.030*** | − 0.049*** | − 0.061*** | − 0.017*** | − 0.004*** |
| (− 41.181) | (− 30.751) | (− 36.311) | (− 46.551) | (− 17.317) | (− 5.277) | |
| R2 (within) | 0.993 | 0.981 | 0.986 | 0.989 | 0.990 | 0.772 |
| No. of cities | 38,452 | 38,452 | 38,452 | 38,452 | 38,452 | 38,452 |
| Observations | Yes | Yes | Yes | Yes | Yes | Yes |
| City FE | Yes | Yes | Yes | Yes | Yes | Yes |
| City by date trend | Yes | Yes | Yes | Yes | Yes | Yes |
| ln(Migration) by date trend | Yes | Yes | Yes | Yes | Yes | Yes |
Standard errors are clustered at the city-day level. t statistics are reported below the coefficients in parentheses
***Significant at 1%
**Significant at 5%
*Significant at 10%