Explaining variables | Coefficient | Standard deviation | T value | Concomitant probability |

The proportion of the first largest shareholder | 0.0059481 | 0.0023692 | 2.45 | 0.514 |

Asset-liability ratio | −0.0027357 | 0.0035417 | −0.09 | 0.008 |

Net interest rates | 0.0424893 | 0.0035291 | 1.29 | 0.007 |

The percentage of employees with higher education | 0.0421682 | 0.00167255 | 0.25 | 0.006 |

Constant | 0.5399437 | 0.0304542 | 1.71 | 0.005 |