${\beta }_2$

Wald

MATA

Bootstrap

0

0.929

0.953

0.947

0.1

1.019

1.046

1.04

0.2

1.152

1.178

1.175

0.3

1.307

1.333

1.332

0.4

1.495

1.52

1.524

0.5

1.689

1.717

1.72

0.6

1.878

1.912

1.913

0.7

2.069

2.112

2.109

0.8

2.274

2.327

2.317

0.9

2.503

2.566

2.554

1

2.772

2.843

2.826

1.1

3.047

3.125

3.104

1.2

3.377

3.465

3.443

1.3

3.73

3.826

3.802

1.4

4.131

4.238

4.216

1.5

4.557

4.675

4.645

1.6

5.026

5.156

5.123

1.7

5.546

5.689

5.654

1.8

6.145

6.303

6.266

1.9

6.806

6.982

6.939

2

7.529

7.723

7.68

2.1

8.343

8.559

8.515

2.2

9.173

9.41

9.355

2.3

10.1

10.361

10.303

2.4

11.202

11.492

11.424

2.5

12.403

12.724

12.665

2.6

13.652

14.005

13.922

2.7

15.222

15.615

15.532

2.8

16.669

17.1

17.014

2.9

18.418

18.894

18.794

3

20.331

20.857

20.75