What Multiwinner Method To Push For Local Boards?
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@toby-pereira said in What Multiwinner Method To Push For Local Boards?:
There's always been the question with score voting of whether some voters will lose out by casting a more honest ballot but losing out strategically.
When the voting system is Choose-one Plurality (bad COP), do they lose out by casting a more honest ballot but losing out tactically?
Approval-ordered Llull (letter grades) [10], Score // Llull [9], Score, STAR, Approval, other rated Condorcet [8]; equal-ranked Condorcet [4]; strictly-ranked Condorcet [3]; everything else [0].
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I can see that Cardinal systems may be more be more tempting to strategists, but folks can rank insincerely as well.
One reason IRV is less tempting to strategists is the capricious nature of IRV tabulations makes strategy backfires are more likely.
Group strategy is difficult to pull off, especially if you want to be discreet.
Individual strategy is the larger issue. For individuals the most common strategy is Score or IRV is to give your favorite a top score or rank and your feared rival a bottom score or rank. For many people this would be a sincere vote, leading to the fear that people who view the world in black and white may have more voting effect, particularly in Score.
Your suggestions from other threads of 100, 99, 1, 0 ballots and 100,99, 90, 50, 10, 1, 0 ballots could help. The instructions: score the best candidate 5, the worst 0, the others in comparison, ties are ok, also helps.
STAR is another attempt to ward off strategy. STAR has fails a lot of criterion because it has a utilitarian component and a majority component, yet it does very well in Jonathan Quinn's satisfaction simulations. Maybe there is some value halfway passing the mutually exclusive criterion. I believe it would take a good number of real world close three-way elections to find out.
I am rooting for the good folks in Eugene, OR. The election for their STAR ballot initiative concludes May 21st. I am perturbed by FUD dump by Unite America in the election campaign.
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@lime said in What Multiwinner Method To Push For Local Boards?:
@toby-pereira said in What Multiwinner Method To Push For Local Boards?:
Well, SPAV is purely approval whereas SPAV + KP is scores, so which ends up being more proportional might depend on exactly how you define proportional and also how people vote in practice. There's always been the question with score voting of whether some voters will lose out by casting a more honest ballot but losing out strategically.
Thus my question in another thread, about whether Harmonic voting might lose the stable winner set properties of PAV. The stable winner set seems like it could provide some very strong strategy-resistance properties, similar to Condorcet in single-winner elections.
I don't think its strategy resistance is as strong as it would be with ranked ballots. With approval voting, you still have to decide whether to approve candidates you don't like as much because you think they've got a better chance of being elected.
Schulze STV uses ranked ballots and reduces to the Schulze Condorcet method in the single-winner case. It's probably more strategically robust than an approval-based method that satisfies core stability.
