Date:         Wed, 21 Sep 2005 09:16:59 -0400
Reply-To:     Todd.Case@FRX.COM
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Todd Case <Todd.Case@FRX.COM>
Subject:      Proc Logistic,
              why are the main effects identical for 2 populatio n subsets?

I am using 2 identical Proc Logistic statements (only difference is the 2
are subset using 2 different populations).  So the estimates of all
interaction terms which include the subset populations are different (as
expected) but the estimate for the main effect terms are identical (I know
this cant be the same because they are identcial to the 1/10000th place)!
Any ideas?


This e-mail and its attachments may contain Forest Laboratories, Inc. proprietary information that is privileged, confidential or subject to copyright belonging to Forest Laboratories, Inc. This e-mail is intended solely for the use of the individual or entity to which it is addressed. If you are not the intended recipient of this e-mail, or the employee or agent responsible for delivering this e-mail to the intended recipient, you are hereby notified that any dissemination, distribution, copying or action taken in relation to the contents of and attachments to this e-mail is strictly prohibited and may be unlawful. If you have received this e-mail in error, please notify the sender immediately and permanently delete the original and any copy of this e-mail and any printout.