The Zero-Inflated Binomial (ZIB) method of Tyre et al. (2003) that incorporates estimation of false zero rates we implemented in SAS v9.1 . In addition the use of Akaike's Information Criterion (AIC) is illustrated to weight alternative models, and the area under the curve (AUC) of the Receiver Operating Characteristic curve (ROC) for assessing model fit and prediction accuracy (Cumming 2000; Boyce et al. 2002). The purpose of this Extension Note is to show how to implement these methods using SAS.
Download Extension Note 74 PDF file (352 KB)
To view this document you need the current version of
Adobe Acrobat Reader, available free from the
Adobe Web Site.
Updated April 18, 2007