Choosing Voting Systems Behind the Veil of Ignorance: A Two-Tier Voting Experiment

There are many situations where different groups make collective decisions by voting in an assembly or committee in which each group is represented by a single person. There is a great deal of theoretical, normative literature on the question of what voting system such an assembly should use, but a consensus is lacking. Instead of studying theoretical concepts on the design of voting systems, I ask which voting systems individuals actually prefer. This is important for the legitimacy and acceptance of voting institutions. To answer this question, I design a laboratory experiment in which participants choose voting systems for assemblies when they do not know which group they will be in (and, as a control, when they do know it). Behind the veil of ignorance, participants predominantly choose voting systems that allocate more voting power to larger groups than the most prominent theoretical concept suggests. In front of the veil of ignorance, participants predominantly choose voting systems favoring their own group.