We introduce a procedurally fair rule to study a situation where people disagree about the value of three alternatives in the way captured by the voting paradox. The rule allows people to select a final collective ranking by submitting a bid vector with six components (the six possible rankings...

Different evaluators typically disagree how to rank different candidates since they care more or less for the various qualities of the candidates. It is assumed that all evaluators submit vector bids assigning a monetary bid for each possible rank order. The rules must specify for all possible...

Ad-hoc contracting allows to quickly react to changes which could be neglected or noticed too late in case of constant contracting. But always deciding anew, e.g., how much and what to order in commercial and what to buy in private life, is too cumbersome. To capture the cognitive burden of...