ig

Coef.

Std. Err.

z

P > |z|

wig

0.027

0.005

6.01

0.000

oig

−0.071

0.051

−1.39

0.164

pig

−0.006

0.001

−4.72

0.000

tig

0.007

0.002

3.08

0.002