Professor Dr. John E. Tilton
„Our two mental models of mineral depletion—the physical view and the economic view—differ greatly in their implications for the nature of depletion, its future threat, and the public policies needed for coping with this threat. Though the physical view is more popular, the economic view is far more useful and helpful.“
Currently an Emeritus Professor, Dr. Tilton for many years divided his time between Chile, where he held the Chair in Mineral Economics in the Engineering School of Pontificia Universidad Católica de Chile, and the United States, where he was a Professor in the Division of Economics and Business at the Colorado School of Mines. His teaching and research interests over the past 30 years have focused on economic and policy issues associated with the metal industries and markets. Recent research examines the role of mining in economic development, the environment and mining, material substitution, long-run trends in metal demand, the recycling of metals, the sources of productivity growth in mining, the competitiveness of mineral markets, and changes in comparative advantage in metal trade. His most recent books are: On Borrowed Time?, which examines the long-run challenge for modern civilization from the depletion of mineral resources, and with Juan Ignacio Guzmán Mineral Economics and Policy, which explores the nature and behavior of mineral commodity markets.