Richard L. Church, PhD, is Professor of Geography at University of California, Santa Barbara, specializing in the analysis of problems defined over space and time, including logistics and transportation, location theory, water resource systems, and urban and environmental systems. Dr. Church has published more than 190 papers and research reports and is the co–founding editor of the journal Location Science, now published as part of Computers and Operations Research.

Alan T. Murray, PhD, is Professor of Geographical Sciences at Arizona State University. Dr. Murray has published more than 130 papers and research reports covering topics in spatial analysis, optimization, location modeling, and urban and regional planning. He has served as the editor of Geographical Analysis since 2002.