Dear Dr. King, My co-authors and I were interested in implementing a latent class analysis using rare events data and it seems the current relogit set-up does not allow for this. We tried to then replicate the basic relogit procedure in SAS but ran up against the limitations of SAS's matrix inversion capabilities. I was wondering if there is a way to program the rare events methodology using SAS. Are you aware of such an implementation, or a procedure in relogit that may allow us to do this? Can you please advise us? Regards, Deepa Chandrasekaran -- Assistant Professor of Marketing College of Business & Economics Lehigh University 621 Taylor St., Bethlehem, PA 18015 Email: dec207(a)lehigh.edu Phone (Office): 610-758-6582 Fax: 610-758-6941 -- relogit mailing list served by Harvard-MIT Data Center List Address: relogit(a)lists.gking.harvard.edu Subscribe/Unsubscribe: http://lists.gking.harvard.edu/?info=relogit