Download presentation

1
**Penalized Maximum Likelihood Logistic Regression**

Joseph Coveney Cobridge Co., Ltd.

2
**Topics Separation in Logistic Regression Approaches to Separation**

Firth’s Bias-reduced GLMs firthlogit: syntax and examples Caveats and to-do’s

3
**Separation in Logistic Regression**

5
Complete Separation Dataset adapted from D. W. Hosmer and S. Lemeshow, Applied Logistic Regression Second Edition. (New York: John Wiley & Sons, 2000), pp. 138–39.

6
**Quasi-complete Separation**

Dataset adapted from D. W. Hosmer and S. Lemeshow, Applied Logistic Regression Second Edition. (New York: John Wiley & Sons, 2000), pp. 138–39.

8
**Approaches to Separation**

Remove predictors Pool groups Remove interaction terms Gather more data Use alternatives

9
**Exact Logistic Regression**

10
But . . . Dataset from D. M. Potter A permutation test for inference in logistic regression with small- and moderate-sized data sets. Statistics in Medicine 24:693–708.

12
**[19] D. Firth. 1993. Bias reduction in maximum likelihood estimates**

[19] D. Firth Bias reduction in maximum likelihood estimates. Biometrika 80:27–38.

13
firthlogit

16
But redux

17
But redux, continued

20
**Profile Likelihood Ratio CIs**

22
Caveats Profile Penalized Likelihood CIs Small-sample Behavior

23
G. Heinze and M. Ploner, A SAS macro, S-PLUS library and R package to perform logistic regression without convergence problems. Technical Report 2/2004. Medical University of Vienna. p. 36.

26
To-do’s Profile Penalized Likelihood CIs Modify ml d0

Similar presentations

OK

Data preparation for use in SEM Ned Kock. Data in table format Each column corresponds to a manifest variable. Some groups of columns correspond to a.

Data preparation for use in SEM Ned Kock. Data in table format Each column corresponds to a manifest variable. Some groups of columns correspond to a.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To ensure the functioning of the site, we use **cookies**. We share information about your activities on the site with our partners and Google partners: social networks and companies engaged in advertising and web analytics. For more information, see the Privacy Policy and Google Privacy & Terms.
Your consent to our cookies if you continue to use this website.

Ads by Google

Ppt on first conditional grammar Book appt online Ppt on natural resources and conservation colleges Ppt on nepal culture Ppt on viruses and anti viruses for computer Ppt on traction rolling stock trading Ppt on dressing etiquettes Ppt on sustainable tourism practices in kenya Free download ppt on roman numerals Dentist appt on your birthday