变量 | 地区 | 城市级别 | 时期(年份) | |||||
(1) 东部 | (2) 中部 | (3) 西部 | (4) 副省级及 以上城市 | (5) 普通城市 | (6) 2003~2006 | (7) 2007~2012 | (8) 2013~2017 | |
ppe | 10.97** (2.338) | −17.01** (−2.507) | −0.643 (−1.501) | −0.231 (−0.154) | −0.736** (−2.014) | −0.364** (−2.140) | −56.73*** (−2.624) | −11.41 (−0.658) |
ppe2 | −0.586** (−2.373) | 0.888** (2.571) | 0.0485 (1.417) | 0.0376 (0.415) | 0.0471* (1.755) | 0.0307** (2.294) | 2.704** (2.592) | 0.605 (0.708) |
others | YES | YES | YES | YES | YES | YES | YES | YES |
year FE | YES | YES | YES | YES | YES | YES | YES | YES |
Constant | YES | YES | YES | YES | YES | YES | YES | YES |
观测值数 | 2057 | 1377 | 1496 | 595 | 4335 | 1740 | 1740 | 1450 |
Adj R2 | 0.847 | 0.854 | 0.804 | 0.865 | 0.822 | 0.899 | 0.816 | 0.026 |