[R-sig-Geo] (no subject)

[Sam Field]

List,

I am looking for ways of estimating spatial autoregression models that adjust 
for a known source of heteroskedaticity and the Waller and Gotway (2004) text 
outline how this can be done in the case of the SAR model.  If I work at it, I 
think I can implement this myself in R, but I wanted to see if anybody else had 
done it. It seems like a pretty straightforward generalization of the SAR model 
and would make a very helpful addition to the spatial regression tools in 
spdep - especially given the effects of heteroskedaticity on the consistency of 
the SAR parameters! 

Sam
 
 


-- 
********Note the new contact information*******

Samuel H. Field, Ph.D. 
Senior Research Investigator
CHERP/Division of Internal Medicine - University of Pennsylvania
Philadelphia VA Medical Center
3900 Woodland Ave (9 East)
Philadelphia, PA 19104
(215) 823-5800 EXT. 6155 (Office)
(215) 823-6330 (Fax)