As a matter of curiosity, I checked out the websites for SUDAAN and
WesVar. It's patently clear that SUDAAN can perform many more
statistical analyses than WesVar.
Unfortunately this comes with a price. It costs $495 for a permanent
commercial or government license of WesVar. Academic users only need to
pay 350 dollars for a permanent license.
On the other hand, to license Sudaan v. 9 the government license costs
$1015 dollars; the commercial license costs 1,140 dollars, and an
academic license costs costs 875 dollars. Obviously, SUDAAN is much
more expensive than WesVar. Also WesVar offers student versions for a
mere 29 dollars.
Each of these survey research methods software programs is advertised
as complementing both SAS and SPSS.
So that's the scoop.
As far as using simulations to compute sample size, you must still need
to prespecify your type I and type II errors; otherwise you cannot
interpret the results of a given simulation. Yet, once you've stated
your alpha and power requirements, you need only use a simple
mathematics formula to determine sample size requirements. Thus,
running simulations is hardly necessary, since you still need to state
your alpha and power requirements.
Upon inspection, it's clearly easy to see that SUD
>>> Joseph Teitelman temp2 7/12/2006 4:27 PM >>>
SUDAAN was developed by the Research Triangle Institute, which is
surrounded by Duke, UNC, and NCSU. As such, SUDAAN is quite popular
around that area of NC. WesVar directly competes with SUDAAN.
I've used SUDAAN but not WesVar.
I'd suspect that the only differences between these two packages which
specialize in the analysis of complex and sometime multistage sampling
In the 90s, neither SAS nor SPSS provided facilities for analyziing
survey data. Now, both software packages perform analyses of survey
data. Yet, they were never developed to specialize in the analysis of
sample survey data. Whereas, SUDAAN and WesVar were.
Since you probably don't have 1000 dollars to purchase SUDAAN or
WesVar, I'd suggest that you use the SPSS add-on developed for that very
purpose. Personally, I'm a SAS user, but have been forced to learn SPSS
as part of my job.
I hope this information proves helpful
>>> "Will Bailey [Statman]" <[hidden email]> 7/11/2006 8:27 AM
There also is Westat's WesVar and SUDAAN
One point, IMHO, none is better than the other only a personal
Also, each handles the sample development slightly different.
The SPSS module is fully integrated into SPSS and a great benefit if
primary stat pack is SPSS. WesVar & SUDAAN are pretty much standalone.
have used WesVar for several years but know very little about the
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf
Sent: Monday, July 10, 2006 7:53 PM
To: [hidden email] Subject: Complex Samples - SPSS vs Stat
I am using a national dataset that employs a complex sampling design.
understand the reasons for using software that accounts for the
and complex sampling design. However, I see that there are a few
packages available to assist with complex samples. I would like to use
either SPSS Complex Samples or Stata. Is one package better, easier,
than the other?