[Openspace] Regression with selected Obs.
Jochen Mistelbacher & Sarika Sharma
jocsar at t-online.de
Wed Aug 11 23:37:25 CDT 2004
as a "Newbie" to GeoDa, which I unfortunately discovered only recently,
I would like to pose a question regarding running a spatial-lag-MLE only
on selected areas of a polygon-shapefile.
The Setting: I have a shapefile made up of more than 500 areal units
(districts in this case), a dependent variable and multiple independent
variables. To account for spatial autocorrelation, I run the
spatial-lag-model on the whole set.
The Aim: I want to compare the coefficients for different regions of the
whole set, and not like the "Geographically Weighted Regression" for
The Problem: I would like to run the spatial-lag-model using only
selected areal units (in this case districts belonging to certain
states). As of course these selected units have neighbours outside the
selected area, simply creating new shapefiles and weights wouldn`t solve
the problem, as then the peripheral areas would not have neighbours and
the weights would not have a "true" value". If I would include the
first-order-neighbours in a new shapefile, so that their "influence" is
taken into consideration , then of course the selected area would not be
strictly limited to the next higher administrative boundary (here states).
Question: Is there a way to deal with this problem?
And as I am already on it, a most probably rather stupid question on
MLE: Can I calculate the "Beta-coefficients" using MLE?
Thanking in advance for good advice!!
Dept. of Geography
University of Mannheim
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