From rhoskins@home.com Sun May 23 07:12:03 1999 Received: from mxu3.u.washington.edu (mxu3.u.washington.edu [140.142.33.7]) by lists.u.washington.edu (8.9.3+UW99.02/8.9.3+UW99.01) with ESMTP id HAA30854 for ; Sun, 23 May 1999 07:12:02 -0700 Received: from ha1.rdc1.wa.home.com (siteadm@ha1.rdc1.wa.home.com [24.0.2.66]) by mxu3.u.washington.edu (8.9.3+UW99.02/8.9.3+UW99.01) with ESMTP id HAA08046 for ; Sun, 23 May 1999 07:12:02 -0700 Received: from c501552a ([24.5.121.123]) by ha1.rdc1.wa.home.com (Netscape Mail Server v2.02) with SMTP id AAA28985 for ; Sun, 23 May 1999 07:12:01 -0700 Message-ID: <004201bea526$380d7960$7b790518@olmpi1.wa.home.com> From: "Richard E. Hoskins" To: References: Subject: Re: WAPHGIS: geostatstics Date: Sun, 23 May 1999 07:11:57 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2014.211 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2014.211 Lance: The only BUGS site I could get to work is the Australian one http://silmaril.fsc.qut.edu.au/bugs/ and the documents I downloaded http://silmaril.fsc.qut.edu.au/bugs/ are (I guess) in postscript but nothing I have opens them. One is supposed to be able to look at the manuals on-line but the link is dead. If you have direct experience with or use BUGS perhaps you have the manuals? I downloaded the Windows version but one needs the manuals for the DOS version in order to get a handle on what BUGS is all about in the first place. If not - don't bother, I do not want to have you use your time for this. Looks like the server connections are outdated, etc ... looks like really the BUGS project is dead. Like I said, if you are not really familiar with this stuff, don't bother and thanks anyway. I collected all the papers (and more) you suggested. My PhD is in chemical physics (statistical mechanics - so I can guess with Gibbs sampling is all about) , so mathematical stuff doesn't bother me, but I am afraid I know just enough statistics to make a fool of myself. I may need to ask some "stupid" questions. Thanks for the citations Dick Hoskins ----- Original Message ----- From: Lance Waller To: Sent: Tuesday, May 11, 1999 1:27 PM Subject: Re: WAPHGIS: geostatstics > There's a good introduction to Gibbs sampling-based smoothing in the > chapter by Clayton and Bernardinelli in the Elliott et al 1992 book > (referenced in the last message). > > I don't think Gibbs sampling entirely removes the problem of > oversmoothing but I'm not aware of much work quantifying this. > The fully Bayes version (based on Gibbs sampling) > does put the approach into a framework where there spatial correlation > appears as random effects (sort of spatial residuals) in a Poisson > regression model. No Splus or SAS code, but the general method applied to > the Scotland lip cancer data from Clayton and Kaldor's Empirical Bayes > paper appears as a worked example in the BUGS (Bayesian inference Using > Gibbs Sampling) software (free software, winBUGS is the Windows version): > > http://www.mrc-bsu.cam.ac.uk/bugs/Welcome.html > > For some papers on constrained empirical Bayes estimation (to avoid > the overshrinkage) see the papers by Owen Devine (at CDC): > > Devine, O.J., Louis, T.A., Halloran, M.E. (1994) Empirical Bayes methods > for stabilizing incidence rates before mapping. Epidemiology. 5, 622-630. > > Devine, O.J., Louis, T.A. (1994) A constrained empirical Bayes estimator > for incidence rates in areas with small populations. Statistics in > Medicine, 13, 1119-1133. > > Lance Waller > > > On Tue, 11 May 1999, Richard E. Hoskins wrote: > > > I guess I am glad I made the crack - look at what we got! Thank you. As an > > aside I have been looking at Empirical Bayes smoothing for some time, but > > there is the apparent problem of over-shrinking which may be addressed by > > Gibbs Sampling. Any ideas? (I guess I might be more straightforward if I > > asked if there is SAS or S-Plus code available) > > > > Again, thanks > > > > Richard Hoskins > > rhoskins@home.com > > > > > .