This procedure calculates the Firth logistic regression model, which can address the separation issues that can arise in standard logistic regression.
- IBM SPSS Statistics 18 or later and the corresponding IBM SPSS Statistics-Integration Plug-in for R.
Note: For users with IBM SPSS Statistics version 23 or higher, the STATS FIRTHLOG extension is installed as part of IBM SPSS Statistics-Essentials for R.
- Open IBM SPSS Statistics
- Navigate to Utilities -> Extension Bundles -> Download and Install Extension Bundles
- Search for the name of the extension and click Ok. Your extension will be available.
- Apache 2.0
- JKP, IBM SPSS