Table 1.
Regression Results for Basic Model
| Variables | PM2.5ave | PM2.5max |
|---|---|---|
| Windspeed | -0.256*** | -3.865*** |
| (0.0628) | (0.742) | |
| Train speed | 0.0131** | 0.185* |
| (0.00582) | (0.089) | |
| Passenger | 0.257 | 7.785 |
| (0.455) | (7.265) | |
| Empty Coal | 2.274* | 12.179 |
| (1.301) | (8.194) | |
| Freight | 4.496*** | 18.498*** |
| (0.347) | (4.095) | |
| Full Coal | 6.794*** | 22.838*** |
| (1.252) | (7.484) | |
| R2 | 0.16 | 0.25 |
| n | 2829 | 550 |
PM2.5ave = average during train passage; PM2.5max = maximum 10 s during train passage; standard errors in parentheses
*** p < 0.01, ** p < 0.05, * p < 0.1