| 东部 | 中部 | 西部 | |
|---|---|---|---|
| x | 0.310*** (0.051) | 0.366*** (0.059) | 0.323*** (0.049) |
| c1 | 0.084*** (0.018) | 0.004 (0.039) | 0.037*** (0.014) |
| c2 | -0.012 (0.014) | -0.027 (0.025) | 0.005 (0.013) |
| c3 | 0.006*** (0.002) | 0.109*** (0.025) | 0.062*** (0.022) |
| c4 | 0.246*** (0.046) | 0.046 (0.049) | 0.069*** (0.017) |
| _cons | 7.812*** (2.434) | 10.193 (6.738) | 7.840*** (1.924) |
| N | 110.000 | 80.000 | 110.000 |
| r2 | 0.789 | 0.856 | 0.852 |
