V. Kelly Turner is Assistant Professor of Urban Planning and Associate Director of Urban Environmental Research at the Luskin Center for Innovation in the Luskin School of Public Affairs at the University of California, USA. She holds a PhD in Geography from Arizona State University, Tempe, USA.

David H. Kaplan is Professor of Geography at Kent State University, USA. He is the past President of the American Association of Geographers and the Editor-in-Chief of Geographical Review.