Coefficient

Std. Error

z

p-value

const

8.25078

0.746805

11.05

<0.0001

***

ps

−1.03696

0.395350

−2.623

0.0087

***

l_labr

0.510446

0.0717979

7.109

<0.0001

***

vmi

−0.0393250

0.0166948

−2.356

0.0185

**

cu

0.0207884

0.0205690

1.011

0.3122

contr

0.352366

0.0483561

7.287

<0.0001

***