Mark J Kaiser is Professor and Director, Research and Development Division, Center for Energy Studies, Louisiana State University, USA. He is also Adjunct Professor in the Department of Petroleum Engineering and in the Department of Environmental Studies, Louisiana State University, Baton Rouge, LA, USA. He has a Ph D in Industrial Engineering from Purdue University, West Lafayette, IN, USA. Brian F Snyder is a Research Associate at the Center for Energy Studies, Louisiana State University, USA. He is a Ph.D. candidate in Ecology at the University of Georgia, Athens GA, USA