Affiliation: | 1. Dipartimento di Scienze Economiche e Aziendali, Università di Pavia, Italy;2. Norwegian Competition Authority, Norway;3. Autorità per l''energia elettrica, il gas e il sistema idrico, Italy;1. Department of Economics, University of Pennsylvania, 3718 Locust Walk, Philadelphia, PA 19013, USA;2. University of Pennsylvania and NBER, USA;1. Economics Discipline Group, University of Technology Sydney, Australia;2. Centre for Applied Macroeconomic Analysis, Australian National University, Australia;3. Department of Management, Università Politecnica delle Marche, Italy;4. IRES Piemonte, Turin, Italy;5. Columbia University, New York, USA |