| Parameter value | t-statistics | P-value |
α0 | −1310.89 | −3.13071 | 0.025937 |
α1 | −356.548 | −3.61718 | 0.015265 |
α2 | −16.5431 | −4.14201 | 0.008979 |
α3 | 416.0629 | 2.360033 | 0.064748 |
α4 | 30.34442 | 3.806339 | 0.012547 |
α5 | 28.30363 | 3.166967 | 0.0249 |
α6 | 0.262391 | 4.19722 | 0.008512 |
α7 | −68.8581 | −2.37225 | 0.063775 |
α8 | −0.10286 | −2.5849 | 0.049139 |