Thanks, Corey. That's really helpful. By the way, have u got the R codes from Edzer? :) Yi -- View this message in context: http://r-sig-geo.2731867.n2.nabble.com/spatio-temporal-simultaneous-autoregression-model-tp7586871p7586894.html Sent from the R-sig-geo mailing list archive at Nabble.com.