Affiliation: | 1. Energy and Resources Group, University of California, Berkeley, United States of America;2. ICTA-UAB, Autonomous University of Barcelona, Spain;3. ICREA, Barcelona, Spain;1. The Robert Day School of Economics and Finance, Claremont McKenna College, United States;2. Institute for the Study of Labor (IZA), Germany;3. Melbourne Institute of Applied Economic and Social Research, University of Melbourne, Australia |