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Table 22 MAE values of regression models fitted on data generated with ZINB regression model, n = 1000

From: A comparison of statistical methods for modeling count data with an application to hospital length of stay

Dispersion

Proportion of Zeros

Poisson

NB

ZIP

ZINB

0.01

0.1

1.0317

1.0316

1.0316

1.0317

0.3

3.1048

3.1048

3.1049

3.1056

0.5

5.1641

5.1639

5.1641

5.1643

0.7

7.2360

7.2357

7.2359

7.2351

1

0.1

1.0590

1.0588

1.0583

1.0590

0.3

3.0980

3.0979

3.0980

3.0990

0.5

5.1694

5.1688

5.1692

5.1694

0.7

7.2343

7.2338

7.2343

7.2340

5

0.1

1.2959

1.2958

1.2943

1.3004

0.3

3.1097

3.1079

3.1089

3.1095

0.5

5.1660

5.1646

5.1658

5.1644

0.7

7.2351

7.2316

7.2341

7.2313

10

0.1

1.6692

1.6708

1.6680

1.6957

0.3

3.1550

3.1544

3.1542

3.1567

0.5

5.1485

5.1454

5.1479

5.1441

0.7

7.2436

7.2350

7.2432

7.2339