变量 | 模型(1) | 模型(2) | 模型(3) | 模型(4) | 模型(5) |
ppe | −0.002 (−0.013) | −0.428 (−1.584) | −0.757** (−2.295) | −0.699** (−2.111) | −0.677** (−2.058) |
ppe2 |
| 0.028 (1.302) | 0.044* (1.759) | 0.041* (1.687) | 0.037 (1.498) |
fd_zc | −0.094*** (−2.787) | −0.094*** (−2.826) | −0.113*** (−4.890) |
|
|
fd_sr |
|
|
| −0.115*** (−3.026) |
|
fd_zyd |
|
|
|
| 0.008 (0.834) |
lnrjgdp |
|
| 0.140* (1.662) | 0.137* (1.668) | 0.120 (1.532) |
cyjg |
|
| 0.028 (1.155) | 0.031 (1.324) | 0.041* (1.865) |
yswsr |
|
| −0.014 (−0.654) | −0.014 (−0.631) | −0.016 (−0.750) |
kjcyrs |
|
| −0.086** (−2.541) | −0.088*** (−2.643) | −0.102*** (−2.928) |
zfgm |
|
| 0.736** (2.523) | 0.742*** (2.752) | 0.484*** (2.618) |
year | 0.907*** (43.69) | 0.907*** (43.64) | 0.906*** (22.05) | 0.914*** (23.40) | 0.946*** (25.36) |
Constant | YES | YES | YES | YES | YES |
时点固定 | YES | YES | YES | YES | YES |
个体固定 | YES | YES | YES | YES | YES |
观测数 | 4930 | 4930 | 4930 | 4930 | 4930 |
Adj R2 | 0.866 | 0.866 | 0.869 | 0.868 | 0.867 |