Another small remark:
With N voters total and B benchmark voters, the size D of the deciding
group should probably be O(sqrt(N-B)).
This is because the amount transferred to an individual deciding voter's
account is roughly proportional to D times a typical individual rating
difference, hence the total amount transferred to the deciding group is
proportional to D² times a typical individual rating difference. The
same total amount is payed by the group of at most N-B-D compensating
voters. Each of them should not be required to pay more than a constant
multiple of a typical individual rating difference, hence D²/(N-B-D)
should be O(1).
Jobst
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