变量 | hd1 | |||||
(1) | (2) | (3) | ||||
L.ccbp | 0.064*** | 0.063*** | 0.066*** | |||
(3.16) | (3.22) | (3.34) | ||||
L.size |
| 0.260*** | 0.260*** | |||
| (14.40) | (14.40) | ||||
L.age |
| 0.600*** | 0.600*** | |||
| (5.93) | (5.92) | ||||
L.lev |
| 0.453*** | 0.454*** | |||
| (6.83) | (6.87) | ||||
L.roa |
| 0.913*** | 0.909*** | |||
| (5.94) | (5.93) | ||||
L.dua |
| −0.020 | −0.019 | |||
| (−1.04) | (−1.02) | ||||
L.grow |
| 0.162*** | 0.161*** | |||
| (10.11) | (10.10) | ||||
L.ind |
| 0.001 | 0.001 | |||
| (0.58) | (0.59) | ||||
L.gdp |
|
| −0.020 | |||
|
| (−0.76) | ||||
常数项 | 6.080*** | −1.626*** | −1.282** | |||
(66.46) | (−3.50) | (−1.97) | ||||
企业固定 | 控制 | 控制 | 控制 | |||
年份固定 | 控制 | 控制 | 控制 | |||
样本量 | 19491 | 19491 | 19491 | |||
R2 | 0.863 | 0.873 | 0.873 | |||