Difference-in-differences regression results, months January–April
| (1) | (2) | (3) | (4) | |
| Collisions | Deaths | Serious injuries | Minor injuries | |
| Difference-in-differences interaction term | −12.020*** | −0.703*** | −0.407** | −13.981*** |
| (−18.246 to −5.795) | (−1.131 to −0.276) | (−0.774 to −0.039) | (−21.383 to −6.580) | |
| Treatment period dummy (March–April) | 3.706*** | 0.189* | 0.194* | 4.255*** |
| (1.592 to 5.819) | (−0.002 to 0.379) | (−0.001 to 0.388) | (1.793 to 6.717) | |
| Treatment group dummy (2020) | 2.712** | 0.216 | 0.287** | 3.214** |
| (0.340 to 5.085) | (−0.055 to 0.488) | (0.046 to 0.528) | (0.039 to 6.389) | |
| Unemployment rate | 0.018 | 0.032** | 0.081*** | 0.014 |
| (−0.168 to 0.204) | (0.004 to 0.059) | (0.044 to 0.118) | (−0.214 to 0.241) | |
| Petrol prices per litre | −5.043 | −0.393 | −0.171 | −3.308 |
| (−15.923 to 5.837) | (−1.315 to 0.528) | (−1.202 to 0.861) | (−15.720 to 9.104) | |
| Constant term | 11.395 | 0.203 | −1.184 | 9.940 |
| (−7.059 to 29.849) | (−1.600 to 2.006) | (−3.386 to 1.018) | (−11.293 to 31.173) | |
| Observations | 1224 | 1224 | 1224 | 1224 |
| R-squared | 0.965 | 0.780 | 0.796 | 0.961 |
| F-statistic | 71.40 | 13.13 | 14.32 | 62.33 |
Month dummies and regional unit fixed effects are included in the regressions. Robust CIs in brackets.
***P<0.01, **p<0.05, *p<0.1.