| 调整样本期间 | 改变样本容量 | ||
| (1) | (2) | (3) | (4) |
| TobinQ | ROA | TobinQ | ROA |
DT | 0.635*** | 0.009*** | 0.865*** | 0.007** |
| (6.345) | (2.990) | (8.386) | (2.409) |
Size | −0.211*** | 0.006*** | −0.108*** | 0.009*** |
| (−15.518) | (14.895) | (−6.896) | (20.525) |
Lev | −1.019*** | −0.099*** | −1.257*** | −0.102*** |
| (−12.572) | (−42.709) | (−11.694) | (−33.005) |
Growth | 0.249*** | 0.019*** | 0.566*** | 0.030*** |
| (7.174) | (13.647) | (13.107) | (18.778) |
Age | 0.170*** | 0.006*** | 0.205*** | 0.006*** |
| (4.824) | (4.950) | (5.679) | (5.313) |
Indep | 0.352* | −0.022*** | 0.720*** | −0.010 |
| (1.728) | (−3.504) | (3.273) | (−1.549) |
Top10 | −0.584*** | 0.049*** | −0.578*** | 0.054*** |
| (−7.522) | (19.914) | (−6.901) | (21.996) |
State | 0.139*** | −0.006*** | 0.184*** | −0.007*** |
| (5.420) | (−6.623) | (5.837) | (−7.161) |
_cons | 6.647*** | −0.076*** | 4.203*** | −0.145*** |
| (21.740) | (−8.591) | (11.363) | (−14.883) |
Obs. | 8924 | 8924 | 10251 | 10251 |
R-squared | 0.124 | 0.275 | 0.061 | 0.206 |