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- Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
- Path: sparky!uunet!paladin.american.edu!auvm!HARVARDA.BITNET!SCM
- Message-ID: <SAS-L%92072015370192@VM.MARIST.EDU>
- Newsgroups: bit.listserv.sas-l
- Date: Mon, 20 Jul 1992 15:25:05 EST
- Reply-To: Steve Marcus <SCM@HARVARDA.BITNET>
- Sender: "SAS(r) Discussion" <SAS-L@UGA.BITNET>
- From: Steve Marcus <SCM@HARVARDA.BITNET>
- Subject: missing data analysis
- Lines: 22
-
- has anybody out there had any experience doing analysis on missing data?
-
- our dataset will have the following characteristics:
-
- 1) multiple observations per subject
- 2) subjects nested within a large number of groups
- 3) some variables measured on the subjects some measured on the groups
- (a group would be something like a census tract)
-
- data are missing when:
-
- 1) a subject lacks one or more variable measurements
- 2) a group is lacking the required number of subjects
- 3) a group is lacking one or more variable measurements
-
- has anyone used or developed routines that will estimate the missing
- values (perhaps EM algorithm). BMDP has some routines for missing data
- but don't seem to handle all our types of missingness.
-
- any pointers in the right direction would be appreciated.
-
- thanks
-