Paul M.W. Hackett is a Professor of Ethnography and Consumer Behavior at Emerson College, USA and a visiting academic in the Philosophy Department at the University of Oxford, UK. His books include Facet Theory and the Mapping Sentence: Evolving Philosophy, Use and Application, Fine Art and Perceptual Neuroscience: Field of Vision and the Painted Grid, and Conservation and the Consumer: Understanding Environmental Concern. His research and writing has appeared in Psychometrika; International Review of Retail, Distribution, and Consumer Research; Environment and Behavior; the British Journal of Management; Multivariate Behavior Research; and other prestigious journals. He is a Chartered Psychologist in the UK.