coefficient

value

t-stats

p

2011

α

8.29

9.21

1.76e−15

β

0.166

0.408

0.684

γ

−1.43

−5.97

2.66e−8

2012

α

7.50

8.30

2.17e−13

β

0.0812

0.202

0.841

γ

−1.24

−5.25

7.02e−7

2013

α

12.9

9.50

2.95e−16

β

−0.368

−0.625

0.533

γ

−2.39

−6.80

4.37e−10