R.G. Matson is Professor of Archaeology, Emeritus, at the Department of Anthropology, University of British Columbia (UBC). He earned B.A. in anthropology in 1966 from the University of California, Riverside, and received a Ph.C. (1969) and Ph.D. (1971) in anthropology at the University of California, Davis

Timothy A. Kohler is an archaeologist in the Department of Anthropology at Washington State University. He received his Ph.D. from the University of Florida in 1978, with specialties in southeastern archaeology and quantitative methods, and currently is a research associate at the Crow Canyon Archaeological Center, an external faculty member of the Santa Fe Institute, and director of the WSU/UW IPEM (IGERT Program in Evolutionary Modeling).