Parameter

Starting Values

EM ( $tol={10}^{-4}$ )

EM ( $tol={10}^{-5}$ )

EM ( $tol={10}^{-8}$ )

$\widehat{\alpha }$

0.6556607

2.172327

2.32012

2.727979

$\widehat{\beta }$

−0.1257455

−0.2766788

−0.3220001

−0.4674433

$\widehat{\delta }$

0.8310044

2.026605

2.190487

2.627292

$\widehat{\mu }$

0.1690855

0.3394356

0.3866598

0.5386185

Log-likelihood

−1061.985

−1061.673

−1063.643

No. iteration

31

43

510

AIC

2131.970

2131.346

2135.286