Authors:
G. B. Asheim, Department of Economics, University of Oslo, Blindern, Oslo.
T. Fæhn, Statistics Norway, St. Hanshaugen, Oslo / CICERO, Gaustadalléen 21, Oslo.
K. Nyborg, Department of Economics, University of Oslo, Blindern, Oslo.
M. Greaker, Oslo Business School, Oslo Metropolitan University, St. Olavs plass, Oslo.
C. Hagem, Statistics Norway, St. Hanshaugen, Oslo
B. Harstad, Department of Economics, University of Oslo, Blindern, Oslo / Ragnar Frisch Centre for economic research, Gaustadalléen 21, Oslo / TSE, Toulouse.
M. O. Hoel, Department of Economics, University of Oslo, Blindern, Oslo / Ragnar Frisch Centre for economic research, Gaustadalléen 21, Oslo.
D. Lund, Department of Economics, University of Oslo, Blindern, Oslo.
K. E. Rosendahl, Statistics Norway, St. Hanshaugen, Oslo / School of Economics and Business, Norwegian University of Life Sciences, Ås

This article was published in Science 26 Jul 2019: Vol. 365, Issue 6451, pp. 325-327