> From: Marc Mooney UMN > Sent: Monday, July 18, 2011 1:11 AM > To: SAS-L@listserv.uga.edu > Subject: PROC SURVEYFREQ SE versus SUDAAN > > Hi all, > > I am doing an analysis on a large public dataset. Previous reports on > this data set have used SUDAAN. In replicating some one-way > frequency tables, I can exactly replicate estimates of percentage > rates, BUT my standard error of percentages are much smaller > (about 1/3) than those from SUDAAN.

I attended a pre-conf seminar several years ago, 2009, comparing the SAS Survey* procs with Sudaan.

My limited (non-statistician) understanding of the difference is the way that missing values are handled.

Using Replication Methods to Analyze Survey Data in SAS(R) Software Anthony An and Donna Watts

there are a couple of google hits for this doc:

http://www.columbia.edu/~yw2148/icsa/ShortCourse8.pdf

http://support.sas.com/rnd/app/da/new/dasurvey.html

see also: http://www.sascommunity.org/wiki/Survey_Sampling

Ron Fehd Sudaan (sigh) maven

> As a for instance: > > proc surveyfreq data=temp; > tables AVOIDPDX2 /alpha = .01; > strata stratum; > cluster psu; > weight weight; > run; > > I am assuming I am needing to specify something else, perhaps > about variance estimation. I appreciate any suggestions. > > > Thank you, > > Marc