Model 1

Model 2

Model 3

Model 4

${\alpha }_0$

−0.0044*

(0.0026)

−0.0049*

(0.0028)

−0.0014**

(−0.0007)

−0.0001

(.00081)

${\alpha }_1$

−0.1431***

(0.0220)

−0.1408***

(0.0225)

−0.1579***

(0.0163)

−0.1486***

(0.01664)

${\alpha }_2$

0.2229***

(0.0245)

0.2221***

(0.0244)

0.1953***

(0.0203)

0.1754***

(0.0212)

${\alpha }_3$

0.2971

(1.9475)

0.2637

(1.9990)

14.8359***

(1.9095)

9.1304***

(1.63685)

$\rho$

1.0011***

(0.00087)

1.0009***

(0.0007)

0.9968***

(0.0015)

0.9955***

(0.00227)

$\theta$

−0.9842***

(0.0032)

−0.9842 ***

(0.0032)

−0.9907***

(0.0026)

−0.9824***

(0.0038)

${\beta }_0$

−0.0472**

(0.0194)

−0.1546***

(0.0341)

−30.287***

(1.371768)

−28.368***

(2.3001)

0.9932***

(0.0023)

0.9821***

(0.00422)

−0.5111***

(0.0424)

−0.5139***

(0.0387)

0.1322***

(0.0153)

0.1318***

(0.0172)

0.1192***

(0.0325)

0.0991***

(0.0347)

−0.0234**

(0.0099)

−0.0326***

(0.0121)

−0.0008

(0.0235)

−0.0367

(0.0238)

0.0517***

(0.0172)

0.1240***

(0.0201)

0.1390***

(0.0217)

−0.0047

(0.0072)

−2.1654

(2.6280)

−0.5527***

(0.1431)

−0.7566***

(0.2738)

1.7346***

(0.09611)

1.7318***

(0.1382)

−0.0012

(.00093)

−0.2991***

(0.0162)

−0.2200***

(0.0241)

0.0272*

(0.0144)

0.8935***

(0.1214)

0.4103**

(0.1840)

−0.0051**

(0.0022)

−0.1013***

(0.0190)

−0.1546***

(0.0259)

−0.9531***

(0.3404)

0.6546***

(0.1930)

−0.0028*

(0.0014)

−0.1407***

(0.0311)

0.0146

(0.0192)

0.8240***

(0.2705)

0.0009

(0.0032)

0.1039***

(0.0423)