they were probably referring to CHAID, or Chi-Square Automated Interaction Dectection.

SAS does have a tool that performs CHAID, if you want to know more about it you would probably have to contact SAS Professional Services. It is not part of a standard SAS software module, at least in Version 6.

One good text on the topic is called "Pattern Recognition and Neural Networks." Sorry, I don't have an author or publisher name handy, as I am out of town at present.

Hope this helps **************************************** Andrew H. Karp Sierra Information Services: Solutions Using the SAS System A SAS Institute Quality Partner in the United States of America 1489 Webster Street #1308 San Francisco, CA 94115 415/441-0702 (voice) 415/441-9175 (fax) SFBAY0001 @ AOL.COM