| 变量符号 | 系数 | 标准差 | Z值 | P值 |
| lnage | 0.218 | 0.020 | 10.83 | 0.000 |
| lnsize | −0.643 | 0.030 | −21.36 | 0.000 |
| lnemp | 0.034 | 0.009 | 3.95 | 0.000 |
| lnoutput | −0.333 | 0.009 | −34.66 | 0.000 |
| lnprofit | 0.084 | 0.006 | 14.74 | 0.000 |
| lndebt | 0.430 | 0.014 | 30.38 | 0.000 |
| lnowner | 0.534 | 0.018 | 30.41 | 0.000 |
| _cons | −4.193 | 0.091 | −45.91 | 0.000 |