importFrom(stats, model.matrix, model.response, aggregate)
import(nlme)
import(spdep)
import(Matrix)

export(distance,gstslshet,read.gwt2dist,stslshac,summary.sphet, print.sphet, listw2dgCMatrix,impacts.gstsls)



S3method(print,sphet)
S3method(print,summary.sphet)
S3method(impacts, gstsls)