Is there a name for the voting system criterion which guarantees that, with perfect information, there will always be an optimal semi-honest strategy? This is related to Kristofer's recent message where he pointed out that any voting system which met the following two criteria:<div>
<br></div><div><span style>- Per-candidate monotonicity: If you increase (decrease) the rating of candidate X, holding all other candidate scores constant, that will never reduce (increase) X's chance of winning.</span><br style>
<span style>- Per-candidate independence: Raising or lowering X's score while holding other scores constant never makes the winner turn from A to B (for some pair of other candidates {A, B}).</span></div><div><span style><br>
</span></div><div><span style>... has an optimal approval-style strategy. I'd additionally point out that the optimal strategy is semi-honest.</span></div><div><span style><br></span></div><div><span style>I'd appreciate any literature references people could give me on this topic, as I'd like to include discussion of this in the paper I'm currently writing, but since it's not central to my paper, I only have room to include this if I don't have to get distracted by proving the relevant lemmas (or at least, I'd prefer not to have to, even though I know the proofs are relatively simple). Basically, I want to be able to say "Criteria like LNHarm, LNHelp, FBC, SFC, and XXXXX are particularly useful, because by giving a strategic guarantee to the voters, they can cut down not just on effective strategy but also on strategic misfires."</span></div>
<div><span style><br></span></div><div><span style>Thanks,</span></div><div><span style>Jameson</span></div><div><span style><br></span></div><div><span style>ps. I'd love it if more EM regulars joined <a href="http://www.quora.com">Quora</a> (a question and answer site I like), so that I could ask you folk questions like this there. I think that a lot of the discussion on this list could effectively happen on Quora, and that all but the most highly technical parts of the discussion here would get a wider audience if they happened over there. If anyone here does/has join(ed) Quora, let me know, and I'll happily follow you.</span></div>