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Table 7 MAE values of regression models fitted on data generated with NB regression model

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

Sample Size

Dispersion

Poisson

NB

ZIP

ZINB

50

0.01

0.6457

0.6501

0.6501

0.6477

1

2.0766

2.0981

2.0808

2.1070

5

4.3471

4.7621

4.4190

4.7984

10

6.0011

7.4481

6.2916

7.5888

200

0.01

0.3263

0.3297

0.3263

0.3267

1

1.0397

1.0384

1.0412

1.0402

5

2.2255

2.2529

2.2250

2.2651

10

3.2408

3.0910

3.1349

3.3494

600

0.01

0.1836

0.1828

0.1836

0.1839

1

0.6050

0.6020

0.6057

0.6024

5

1.2813

1.2810

1.2853

1.2935

10

1.8427

1.8309

1.8340

1.8844

1000

0.01

0.1430

0.1427

0.1430

0.1429

1

0.4701

0.4677

0.4696

0.4683

5

0.9983

0.9959

0.9972

1.0025

10

1.4665

1.4614

1.4629

1.4951