Reidar B. Bratvold is a Professor of Petroleum Investment and Decision Analysis at the University of Stavanger, Norway. His research interests include decision analysis, representing and solving decision problems in the upstream oil and gas industry, valuation of risky projects, portfolio analysis, and behavioral challenges in decision making. Prior to entering academia, he spent 15 years in the industry in various technical and management roles. Bratvold is an associate editor for SPE Economics & Management and has twice served as an SPE Distinguished Lecturer. He was made a member of the Norwegian Academy of Technological Sciences for his work in petroleum investment and decision analysis. He holds a PhD in petroleum engineering and an MSc in mathematics, both from Stanford University.

Steve H. Begg spent 19 years in the industry in a variety of positions for Landmark, BP Exploration, and BP Research before becoming a Professor in the Australian School of Petroleum, University of Adelaide. His main interest is in asset-and-portfolio-investment decision making under uncertainty, including economic valuation and psychological factors. Begg has been an SPE Distinguished Lecturer (twice), chair of SPE’s Forum Series Coordinating Committee, and a member of the Editorial Review Committee. He is an associate editor for SPE Economics & Management and was instrumental in starting that journal. He holds a BSc in geological geophysics and a PhD in geophysics, both from Reading University, UK.