1. Department of Economics, Management and Statistics (DEMS), University of Milano-Bicocca, Milan, Italy.
2. Department of Economics, University of Insubria, Varese, Italy; and Department of Economics, Management and Statistics (DEMS), University of Milano-Bicocca, Milan, Italy
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3. Baffi Carefin Center and Department of Economics, Bocconi University, Milan, Italy.
4. Department of Law, University of Pavia, Pavia, Italy.