No outlier

5% outliers

OLS

M

QR

ESL

OLS

M

QR

ESL

${\beta }_0$

28.8062

28.4158

28.0787

28.8102

40.6204

28.7359

28.1893

28.3733

${\beta }_1$

−0.0057

0.0016

0.0129

0.0554

0.2781

0.0255

0.0458

0.0515

${\beta }_2$

0.8205

0.7354

0.5780

1.9846

1.8209

0.9624

0.8708

1.8776

${\beta }_3$

0.7355

0.9075

1.1222

0.1831

4.9434

1.1518

1.4320

0.6300

${\beta }_4$

−0.0417

−0.0375

−0.0194

0.0712

−0.2606

−0.0716

−0.0944

0.0781

${\beta }_5$

−0.0370

−0.0263

−0.0095

−0.0239

0.2315

−0.0202

−0.0150

−0.0159

${\beta }_6$

−4.6644

−4.4641

−4.2399

−8.9039

−10.1189

−5.2498

−5.2998

−8.2283

${\beta }_7$

0.6175

0.5793

0.5339

3.1414

1.9313

0.8235

0.8420

2.7472

${\gamma }_0$

0.7108

0.7118

0.7240

0.7575

−0.0061

0.0022

0.0006

0.6983

${\gamma }_1$

−0.6340

−0.6291

−0.6446

−0.6536

0.0302

0.0016

0.0044

−0.5495

${\gamma }_2$

0.1994

0.1965

0.1999

0.1908

−0.0162

−0.0008

−0.0022

0.1402

${\gamma }_3$

−0.0204

−0.0202

−0.0202

−0.0183

0.0020

0.0001

0.0002

−0.0116

MAPE

3.9138

3.9052

3.9269

4.7627

15.2271

3.9738

3.9743

4.2478