Table 1.
Summary statistics
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | |
|---|---|---|---|---|---|---|---|---|---|---|
| Control | Treatment | Difference treatment-control | ||||||||
| observations | mean | min | max | observations | mean | min | max | p value | ||
| InterFlow | 17,820 |
0.571 (0.965) |
−5.794 | 3.518 | 17,820 |
−0.144 (1.223) |
−7.079 | 3.441 |
−0.715 (0.012) |
≤0.01 |
| IntraFlow | 17,820 |
1.499 (0.189) |
−0.111 | 2.176 | 17,820 |
1.206 (0.474) |
−1.203 | 2.184 |
−0.293 (0.004) |
≤0.01 |
| HighTemp | 17,820 |
9.171 (8.273) |
−26 | 35 | 17,820 |
9.027 (8.739) |
−26 | 32 |
−0.143 (0.090) |
>0.1 |
| LowTemp | 17,820 |
0.0270 (9.399) |
−36 | 26 | 17,820 |
0.0160 (9.999) |
−37 | 24 |
−0.011 (0.103) |
>0.1 |
| WindVel | 17,820 |
2.648 (1.091) |
2 | 8 | 17,820 |
2.758 (1.164) |
2 | 8 |
0.110 (0.012) |
≤0.01 |
| NewCase | – | – | – | – | 10,161 |
0.574 (0.970) |
0 | 9.506 | – | – |
InterFlow is the natural logarithm of the within-city migration index, and IntraFlow is the natural logarithm of the sum of the inflow and outflow migration indices. HighTemp and LowTemp respectively represent the highest and lowest temperatures within a day. WindVel denotes the maximum wind speed in a day. NewCase is the natural logarithm of (one plus) the number of newly confirmed cases. The table in Appendix reports the Pearson correlations of all variables