1. KOF Swiss Economic Institute and ETH Zurich (email: )
2. University of Cologne, ECONtribute, briq, CESifo, CEPR, CAGE Warwick, C-SEB, Max-Planck Institute for Collective Goods Bonn (email: )
3. University of Cologne, ECONtribute, Max-Planck Institute for Collective Goods Bonn, CESifo, CEBI (email: )