Results of influencing the mechanism test
| . | . | Discharge of industrial wastewater . | |
|---|---|---|---|
| digital | 0.0021** (0.001) | −0.1003*** (0.033) | |
| upgrading | / | −2.8199* (1.445) | −2.7421* (1.416) |
| pgdp | 0.2422*** (0.052) | −0.7944 (0.883) | −0.8477 (0.889) |
| Sq_pgdp | − 0.0100*** (0.002) | 0.0291 (0.039) | 0.0308 (0.039) |
| population | − 0.0294*** (0.008) | −0.0489 (0.283) | −0.0348 (0.287) |
| industrial | − 0.7383*** (0.029) | −0.4176 (1.266) | −0.3749 (1.236) |
| expenditure | − 0.0028 (0.017) | −0.1503 (0.127) | −0.1545 (0.130) |
| hum | 0.0070*** (0.002) | −0.0215 (0.029) | −0.0160 (0.029) |
| finance | − 0.0420 (0.052) | −2.2014 (2.872) | −2.7576 (2.827) |
| upgradingt−1 | 0.2850*** (0.036) | ||
| watert−1 | 0.3669*** (0.088) | 0.3581*** (0.086) | |
| Constant | −0.6337** (0.272) | 12.0709** (5.085) | 12.3675** (5.165) |
| N | 1,405 | 1,405 | 1,405 |
| AR(2) | 0.6243 | 0.3224 | 0.0426 |
| . | . | Discharge of industrial wastewater . | |
|---|---|---|---|
| digital | 0.0021** (0.001) | −0.1003*** (0.033) | |
| upgrading | / | −2.8199* (1.445) | −2.7421* (1.416) |
| pgdp | 0.2422*** (0.052) | −0.7944 (0.883) | −0.8477 (0.889) |
| Sq_pgdp | − 0.0100*** (0.002) | 0.0291 (0.039) | 0.0308 (0.039) |
| population | − 0.0294*** (0.008) | −0.0489 (0.283) | −0.0348 (0.287) |
| industrial | − 0.7383*** (0.029) | −0.4176 (1.266) | −0.3749 (1.236) |
| expenditure | − 0.0028 (0.017) | −0.1503 (0.127) | −0.1545 (0.130) |
| hum | 0.0070*** (0.002) | −0.0215 (0.029) | −0.0160 (0.029) |
| finance | − 0.0420 (0.052) | −2.2014 (2.872) | −2.7576 (2.827) |
| upgradingt−1 | 0.2850*** (0.036) | ||
| watert−1 | 0.3669*** (0.088) | 0.3581*** (0.086) | |
| Constant | −0.6337** (0.272) | 12.0709** (5.085) | 12.3675** (5.165) |
| N | 1,405 | 1,405 | 1,405 |
| AR(2) | 0.6243 | 0.3224 | 0.0426 |
Standard error of robustness is reported in parentheses.
*Significance at the 10% level.
**Significance at the 5% level.
***Significance at the 1% level.