3 IZA Discussion Papers
IZA Discussion Paper No. 15322
revised version published in: Games and Economic Behavior, 2022, 135, 338-355.
IZA Discussion Paper No. 4643
completely revised version published as 'On Cooperation in Open Communities' in: Journal of Public Economics, 2014, 120, 220–230
IZA Discussion Paper No. 4624
published in: Games and Economic Behavior, 2014, 87, 122–135.