I am reading "An Introduction to Categorical Data Analysis, Second Edition" by Alan Agresti. Data I am trying to fit is presented in Table 7.3 in the book. The log-linear regression by PROC GENMOD is in Table 7.6. I fitted the same model by PROC CATMOD and the chi-sqaure statistic is different for the main effect term but the same for the interaction term. The estimates and SEs are all different. It seems to me that PROC GENMOD is just fitting a log linear model with intercept, but what model PROC CATMOD is fitting here? And why some of the results are the same while the others are not?

enter image description here

enter image description here

enter image description here

Your Answer

 
discard

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Browse other questions tagged or ask your own question.