| 变量 | (1) Res | (2) Res | (3) Res | (4) Res | (5) Res |
|---|---|---|---|---|---|
| Dig | 0.486*** (0.032) | 0.392*** (0.030) | 0.368*** (0.030) | 0.346*** (0.029) | 0.338*** (0.029) |
| Size | 0.188*** (0.024) | 0.180*** (0.023) | 0.089*** (0.024) | 0.091*** (0.024) | |
| Urb | -0.576*** (0.071) | -0.562*** (0.070) | -0.484*** (0.066) | -0.482*** (0.066) | |
| Mod | 0.172*** (0.045) | 0.297*** (0.044) | 0.268*** (0.047) | ||
| Den | 0.220*** (0.036) | 0.228*** (0.036) | |||
| Env | 0.625*** (0.107) | 0.631*** (0.106) | |||
| Gov | 0.062* (0.037) | ||||
| 常数项 | 0.130*** (0.005) | 0.368*** (0.035) | 0.291*** (0.040) | -1.137*** (0.200) | -1.185*** (0.201) |
| 省份固定 | 是 | 是 | 是 | 是 | 是 |
| 年份固定 | 是 | 是 | 是 | 是 | 是 |
| 观测值 | 372 | 372 | 372 | 372 | 372 |
| R2 | 0.869 | 0.897 | 0.901 | 0.919 | 0.919 |
