Date:         Thu, 1 May 2008 12:20:18 -0700
Reply-To:     "Nordlund, Dan (DSHS/RDA)" <NordlDJ@DSHS.WA.GOV>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         "Nordlund, Dan (DSHS/RDA)" <NordlDJ@DSHS.WA.GOV>
Subject:      Re: Hierarchical Models--Centering predictors--WHY
In-Reply-To:  <963e8d4c0805011208y3b37888di10bec84ecc94f10@mail.gmail.com>
Content-Type: text/plain; charset=iso-8859-1

> -----Original Message-----
> From: SAS(r) Discussion [mailto:SAS-L@LISTSERV.UGA.EDU] On
> Behalf Of Citam
> Sent: Thursday, May 01, 2008 12:08 PM
> To: SAS-L@LISTSERV.UGA.EDU
> Subject: Re: Hierarchical Models--Centering predictors--WHY
>
> On 5/1/08, Tom White <tw2@mail.com> wrote:
> > Peter, Do you know of any good books worth buying from SAS about
> > Hierrachical Linear Models? I prefer books from SAS because
> they might
> > show the actual SAS syntax of the models. Tom
>
> I might recommend that you start with the following:
>
> "Using SAS PROC MIXED to fit multilevel models, hierarchical models,
> and individual growth models", Journal of Educational and Behavioral
> Statistics.
>
> http://gseweb.harvard.edu/%7Efaculty/singer/Papers/Using%20Pro
> c%20Mixed.pdf
>

I would second Peter's recommendation of Singer and Willett's book.  If you want SAS code examples, the datasets and code examples for the book are available from the UCLA Statiscal Computing site listed below

http://www.ats.ucla.edu/stat/examples/alda.htm


Hope this is helpful,

Dan

Daniel J. Nordlund
Research and Data Analysis
Washington State Department of Social and Health Services
Olympia, WA  98504-5204