| 
 | (1) | (2) | (3) | (4) | |
| VARIABLES | GI | GI | GI | GI | |
| Index | 0.266*** | 
 | 
 | 
 | |
| 
 | (2.770) | 
 | 
 | 
 | |
| coverage | 
 | 0.231** | 
 | 
 | |
| 
 | 
 | (2.471) | 
 | 
 | |
| usage | 
 | 
 | 0.200*** | 
 | |
| 
 | 
 | 
 | (2.995) | 
 | |
| digition | 
 | 
 | 
 | 0.029 | |
| 
 | 
 | 
 | 
 | (0.467) | |
| Age | 0.042*** | 0.042*** | 0.045*** | 0.042*** | |
| 
 | (3.588) | (3.547) | (3.775) | (3.518) | |
| Lev | 1.114*** | 1.117*** | 1.141*** | 1.105*** | |
| 
 | (6.072) | (6.086) | (6.211) | (5.986) | |
| Seperation | 0.025*** | 0.025*** | 0.025*** | 0.025*** | |
| 
 | (5.445) | (5.473) | (5.454) | (5.418) | |
| ROA | 0.368 | 0.358 | 0.351 | 0.355 | |
| 
 | (1.121) | (1.089) | (1.069) | (1.077) | |
| Board | −0.239 | −0.240 | −0.252* | −0.270* | |
| 
 | (−1.638) | (−1.643) | (−1.728) | (−1.854) | |
| Largest holder | −0.004* | −0.004* | −0.004* | −0.004* | |
| 
 | (−1.797) | (−1.784) | (−1.809) | (−1.818) | |
| Fin | −1.034*** | −1.034*** | −1.050*** | −1.082*** | |
| 
 | (−2.881) | (−2.880) | (−2.928) | (−3.015) | |
| TobinQ | −0.001 | −0.001 | 0.003 | −0.001 | |
| 
 | (−0.114) | (−0.079) | (0.231) | (−0.105) | |
| Year | −0.108*** | −0.095*** | −0.090*** | −0.033 | |
| 
 | (−3.295) | (−3.034) | (−3.571) | (−1.396) | |
| _cons | 217.724*** | 191.005*** | 180.986*** | 66.459 | |
| 
 | (3.301) | (3.040) | (3.579) | (1.406) | |
| N | 3136 | 3136 | 3136 | 3136 | |
| r2_a | 0.027 | 0.027 | 0.027 | 0.025 | |