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Categorical Data Analysis Using The SAS® System, 2nd Edition by Gary G. Koch, Charles S. Davis, Maura E. Stokes

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8.9. Using the CATMOD and GENMOD Procedures for Logistic Regression

The CATMOD and GENMOD procedures provide alternative ways to perform logistic regression in the SAS System. Prior to the inclusion of the CLASS statement in the LOGISTIC procedure, these procedures provided a way to perform logistic regression with classification variables without having to create a batch of indicator variables. Now that PROC LOGISTIC handles classification variables, there is less need to point out the availability of these procedures for binary logistic regression. However, the CATMOD procedure currently provides the only way in which to perform generalized logits regression in the SAS System (discussed in Chapter 9), and the GENMOD procedure performs logistic ...

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