Dr. Luc Anselin, Regents' Professor and Walter Isard Chair at Arizona State University is an elected member of the United States National Academy of Sciences and a William Alonso awardee, a Walter Isard recipient for distinguished scholarship, and a Fellow of the Regional Science Association International. As Director of the GeoDa Center for Geospatial Analysis and Computation at ASU, he is a spatial scientist with an admirable international reputation. His popular software, GeoDa, developed over a number of years, is a sophisticated, interactive tool used by serious researchers interested in developing exploratory and confirmatory models that are based on the use of georeferenced data. He is expert in the integration of GIS with spatial analytic tools. He is often called upon by practitioners in many disciplines to advise on modeling and GIS development strategies. His user e-mail site is an essential vehicle for monitoring the latest developments in spatial analysis.