1. National Research University Higher School of Economics Moscow Russian Federation
2. Laboratory for Experimental Economics, Department of EconomicsUniversity of Bonn Bonn Germany
3. Department of Health Management and Health EconomicsUniversity of Oslo Oslo Norway
4. Schumpeter School of Business and EconomicsUniversity of Wuppertal Wuppertal Germany
5. Department of Business Administration and Health Care ManagementUniversity of Cologne Cologne Germany