Table 1 Monte Carlo simulation results: mean estimates and RMSEs

200

α

4.41621

3.979304324

1.7899006

1.992043574

λ

1.3580866

2.642335804

1.4287071

1.528578784

δ

3.1167852

2.601663026

1.0337146

0.5898521

ϕ

5.7270324

6.535452517

2.4702434

3.712081559

θ

4.5560563

4.306946865

2.8884959

3.689669972

400

α

3.5972873

3.071770841

1.5456974

1.513782811

λ

1.1196079

0.900800533

1.1382897

0.732002869

δ

2.9333424

1.821450521

1.0064105

0.377302664

ϕ

4.6989703

5.277876069

1.5488732

1.872088246

θ

4.1188983

3.616692978

2.4213684

2.969367761

800

α

3.1040595

2.417025941

1.4359333

1.278449373

λ

1.0626388

0.609066006

1.0432761

0.346996974

δ

2.8960167

1.36814261

1.0017278

0.250650155

ϕ

3.7437056

3.919777583

1.176675

0.766203302

θ

3.4890255

2.748229594

1.9733522

2.197844717

1200

α

2.8399564

2.058703427

1.3884174

1.169251427

λ

1.0429655

0.501712467

1.021836

0.258884917

δ

2.9152476

1.133666485

1.0014919

0.193825437

ϕ

3.1751818

3.043071803

1.083574

0.392293513

θ

3.164176

2.346236284

1.731924

1.788360814