¹ University of Birmingham, ² Durham University

¹ Department of Economics and Law, University of Cassino and Southern Lazio, Cassino, Italy, ² Department of Economics, Ca’ Foscari University of Venice, Venice, Italy, ³ Department of Economics and Finance, Luiss University, Rome, Italy,, ⁴ Max–Planck-Institute for Research on Collective Goods, Bonn, Germany

¹ University of Innsbruck, ² The Ostrom Workshop, Indiana University, ³ Durham University, ⁴ University of Graz