city fixed effect | yes | yes | yes | yes |
time fixed effect | yes | yes | yes | yes |
province specific time trend | yes | yes | yes | yes |
constant | −57.593 | 234.000** | 141.963 | 12.733 |
| (51.648) | (93.237) | (97.168) | (8.554) |
observations | 405 | 401 | 401 | 405 |
R-squared | 0.606 | 0.400 | 0.621 | 0.120 |
number of city | 46 | 46 | 46 | 46 |