| Variables | (1) | (2) | (3) | (4) |
| Small board size | Big board size | Short tenure | Long tenure | |
| Culture | −0.065* | −0.225*** | −0.039 | −0.188*** |
| (−1.882) | (−4.894) | (−1.007) | (−4.981) | |
| size | 0.373*** | 0.399*** | 0.383*** | 0.385*** |
| (56.600) | (44.287) | (53.767) | (49.113) | |
| debt | −0.052 | −0.092 | 0.002 | −0.144*** |
| (−1.201) | (−1.539) | (0.043) | (−2.684) | |
| roa | 0.310** | −0.358* | −0.062 | 0.176 |
| (2.012) | (−1.744) | (−0.354) | (1.021) | |
| caset2 | −0.085* | −0.164** | −0.199*** | −0.003 |
| (−1.698) | (−2.088) | (−3.439) | (−0.043) | |
| loss | 0.083*** | 0.031 | 0.021 | 0.117*** |
| (2.841) | (0.832) | (0.674) | (3.513) | |
| listtime | −0.032*** | −0.014 | −0.043*** | 0.013 |
| (−2.620) | (−0.808) | (−3.488) | (0.648) | |
| ownership | −0.061*** | −0.062*** | −0.064*** | −0.072*** |
| (−4.291) | (−3.213) | (−4.016) | (−4.402) | |
| Big4/big5 | 0.670*** | 0.599*** | 0.618*** | 0.664*** |
| (18.874) | (15.379) | (17.078) | (17.968) | |
| audittenure | 0.041*** | −0.035** | 0.016 | 0.002 |
| (3.939) | (−2.566) | (1.491) | (0.156) | |
| autype | −0.146*** | −0.144*** | −0.143*** | −0.144*** |
| (−3.989) | (−2.969) | (−3.781) | (−3.175) | |
| age | 21.416 | −24.793 | −13.816 | 30.582 |
| (1.398) | (−1.199) | (−0.851) | (1.623) | |
| tenure | −0.019 | 0.050*** | ||
| (−1.472) | (2.885) | |||
| Constant | −78.091 | 101.847 | 59.319 | −114.196 |
| (−1.306) | (1.262) | (0.936) | (−1.553) | |
| Year | Yes | Yes | Yes | Yes |
| Industry | Yes | Yes | Yes | Yes |
| Adj.−R2 | 0.630 | 0.681 | 0.645 | 0.640 |
| N | 4422 | 2536 | 4040 | 2918 |
| Chi2 | 8.27*** | 7.48*** | ||