GEOSTATS: RE: PhD Question
- Dear All
I would like to re-phase my question that I posted a few weeks
Recently, I was made aware of problems that redundant paths
(circular routes) can cause in the fit of 'spatial' models of the form;
Model 1 can be written as ;
But we know that;
From (3) into (2) we get;
Y=Xt+pWXt + (pW)^2Xt+(pW)^3Xt+.....[1+pW+(pW)^2+...]e
Automatically powering W can cause 'serious' problems for the estimation
of the parameters of interst in Model 1. This has been made clear in the
* Blommestein, Hans J . 1985. "elimination of circular Routes in Spatial
Dynamic regression Equations ", regional Science and Urban Economics, V
* Anselin, Luc and Smirnov, Oleg 1996 " Efficient Algorithms for
constructing proper higher order spatial lag operators", Journal
of Regional Science, V(36), No.1, p67-89.
My question is 'why' have these 'important' result detailed in these
papers been ignored in the fitting of spatial auto-regressive model.
Responses would be appreciated.
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