Spatial Interaction, Spatial Multipliers, and Hospital Competition Lee R. Mobley, Ph.D., Research Fellow Public Health and Environment Division RTI International lmobley@rti.org Professor H.E. Frech III, Ph.D. Economics Department University of California at Santa Barbara frech@econ.ucsb.edu Professor Luc Anselin, Ph.D. Director, School of Geographical Sciences Arizona State University luc.anselin@asu.edu June 2008 Keywords: Spatial econometrics; spatial lag model; spatial multiplier; spatial spillovers; hospital antitrust; hospital competition; strategic pricing; Nash bargaining JEL classification: C19; C39; C49; L11; L13; L40; L89; I11; R00