| (1) | (2) | (3) | (4) |
DIF | 0.562*** (1.35) | 0.215*** (0.52) | 0.216*** (0.53) | 0.259*** (0.62) |
Dage | −3.745** (2.06) |
|
|
|
Dage*DIF | −1.646*** (2.89) |
|
|
|
Dgen |
| 1.558*** (3.12) |
|
|
Dgen*DIF |
| −0.465*** (3.17) |
|
|
Dedu |
|
| 1.533*** (3.13) |
|
Dedu*DIF |
|
| 0.456** (3.15) |
|
Dfund |
|
|
| −1.376 (0.98) |
Dfund*DIF |
|
|
| 0.384* (0.72) |
Grow | 0.008*** (13.65) | 0.008*** (13.59) | 0.008*** (13.58) | 0.008*** (13.54) |
Size | 0.142 (1.46) | 0.137 (1.40) | 0.136 (1.39) | 0.130 (1.33) |
Age | −0.187*** (5.28) | −0.110*** (−3.41) | −0.111*** (−3.45) | −0.093 (−1.13) |
Lev | −0.024*** (7.37) | −0.024*** (7.43) | −0.024*** (7.44) | −0.025*** (7.57) |
Roa | −0.059*** (10.35) | −0.058*** (10.29) | −0.058*** (10.29) | −0.058*** (10.23) |
Ide | 0.012* (1.80) | 0.012* (1.76) | 0.012* (1.76) | 0.012* (1.70) |
Constant | 5.785*** (2.64) | 4.992** (2.28) | 5.026** (2.29) | 4.716* (1.74) |
年份 | 控制 | 控制 | 控制 | 控制 |
行业 | 控制 | 控制 | 控制 | 控制 |
R-squared | 0.089 | 0.089 | 0.089 | 0.088 |