Variable

Coef.

Std. Err.

t

P > |t|

β_pi

−0.0089297

0.0055023

−1.6228987

0.352

σ_pi

0.0120432

0.0158092

0.7617831

0.586

Constant

0.0105924

0.0061577

1.7201842

0.335

R-squared

0.727