Test method | Original hypothesis | Statistical magnitude | P value |

F test | H0: The intercept terms of different individuals are the same (mixed regression model) | 45.75 | 0.0000 |

Hausman test | H0: Individual effect has nothing to do with regression variable (random effect regression model) | original: 52.73 sigma more: 109.77 (0.0000) sigma less: 78.76 (0.0000) |