distance				method for creating distance objects
gstslshet               GS2SLS estimation of a spatial model with heteroskedastic innovations
stslshac                S2SLS estimation with Spatial HAC standard errors
print.sphet				print method for class sphet
summary.sphet           summary method for class sphet
listw2dgCMatrix			interface between weights list and sparse Matrices
read.gwt2dist		    interface between GWT files and distance objects
sphet					Estimation of a spatial model with heteroskedastic innovations
