变量 | 东部地区 | 中部地区 | 西部地区 | |||
Open | RDL | Open | RDL | Open | RDL | |
(1) | (2) | (3) | (4) | (5) | (6) | |
du × dt | 0.0314*** | 0.0653 | 0.0271** | 0.0112** | 0.0296*** | 0.00537*** |
(0.00742) | (0.0601) | (0.0112) | (0.00557) | (0.0105) | (0.00767) | |
Open |
| 0.0175*** |
| 0.367*** |
| 0.0609 |
| (0.00550) |
| (0.131) |
| (0.0686) | |
Constant | −0.294*** | 0.171** | 0.0438 | −0.0237 | 0.205*** | 0.624*** |
(0.101) | (0.0724) | (0.125) | (0.0687) | (0.00314) | (0.121) | |
控制变量 | YES | YES | YES | YES | YES | YES |
固定效应 | YES | YES | YES | YES | YES | YES |
观测值 | 160 | 160 | 144 | 144 | 168 | 168 |
R-squared | 0.966 | 0.993 | 0.943 | 0.943 | 0.967 | 0.967 |