<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div style="RIGHT: auto"><SPAN style="RIGHT: auto">Hi Jameson,</SPAN></div>
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<DIV class=hr style="BORDER-RIGHT: #ccc 1px solid; PADDING-RIGHT: 0px; BORDER-TOP: #ccc 1px solid; PADDING-LEFT: 0px; FONT-SIZE: 0px; PADDING-BOTTOM: 0px; MARGIN: 5px 0px; BORDER-LEFT: #ccc 1px solid; LINE-HEIGHT: 0; PADDING-TOP: 0px; BORDER-BOTTOM: #ccc 1px solid; HEIGHT: 0px" readonly="true" contenteditable="false"></DIV><B><SPAN style="FONT-WEIGHT: bold">De :</SPAN></B> Jameson Quinn <jameson.quinn@gmail.com><BR><B><SPAN style="FONT-WEIGHT: bold">À :</SPAN></B> Kevin Venzke <stepjak@yahoo.fr> <BR><B><SPAN style="FONT-WEIGHT: bold">Cc :</SPAN></B> election-methods <election-methods@electorama.com> <BR><B><SPAN style="FONT-WEIGHT: bold">Envoyé le :</SPAN></B> Vendredi 17 février 2012 19h53<BR><B><SPAN style="FONT-WEIGHT: bold">Objet :</SPAN></B> Re: [EM] SODA arguments<BR></FONT></DIV>
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<DIV style="RIGHT: auto">For those who feel that Bayesian Regret is the be-all-and-end-all measure of voting system quality, that SODA's BR for 100% strategic voters will beat all other systems, including Range/Approval. </DIV></BLOCKQUOTE>
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<DIV style="RIGHT: auto">I guess you will have a hard time arguing this, especially if you have multiple audiences. For instance, whether Range/Approval</DIV>
<DIV style="RIGHT: auto">are even all that great is controversial. But if you're an anti-majoritarian type or think it's unfair/unrealistic to propose that voters</DIV>
<DIV style="RIGHT: auto">are strategic, I guess that SODA looks like a step down.</DIV></DIV></DIV></DIV></DIV></BLOCKQUOTE>
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<DIV style="RIGHT: auto">I'm not sure that's true. Clay and Warren are the most hard-core BR advocates, and probably I should let them speak for themselves, but... I think their attitude is not that "strategy is evil" or "Range voters will be 100% honest", but rather, "Some fraction of voters will be honest under range, and that's good, so why not use range and let them?" In that case, the fact that range voting is strictly better (by BR, and for a pre-chosen arbitrary strategic percentage) than [IRV, Condorcet, MJ, etc], is an important foundation of their argument. Finding a system which, while it is worse than range for 100% honest, is actually better than it in some cases (100% strategy, and presumably 99%, who knows where it stops), is an important qualitative difference in the situation.</DIV></DIV></BLOCKQUOTE>
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<DIV dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">Alright. I guess I'll let them make their own arguments if they are so inclined.</DIV>
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<DIV style="RIGHT: auto">Didn't you post an example where SODA declined to elect a "weak CW" that you said was actually a good thing? If that's</DIV>
<DIV style="RIGHT: auto">true, I guess some people won't agree with that.</DIV></DIV></DIV></DIV></DIV></BLOCKQUOTE>
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<DIV style="RIGHT: auto">Yes. The basic setup is two major candidates and a weak centrist. The weaker of the two majors gets to decide which of the other two wins. So if the "weak CW" is truly a CW, they will be preferred by the weaker major, and thus win; but if they are more weak than CW, then the weaker major would rather allow the stronger major to win than stake their reputation on electing the weak CW.</DIV>
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<DIV style="RIGHT: auto">So in the end, it's more a question of giving a last chance to realize that someone isn't really the CW, rather than not electing someone who is the CW.</DIV>
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<DIV dir=ltr style="RIGHT: auto">Concerns me a little. I'm not sure candidates would do the thing their supporters would want (or even that they themselves feel is </DIV>
<DIV dir=ltr style="RIGHT: auto">best) due to pressures like "staking their reputation." For instance, I can see a moderate liberal giving his votes to a more extreme</DIV>
<DIV dir=ltr style="RIGHT: auto">liberal even when he himself prefers a moderate conservative. A voter whose personal ranking crosses the line like that might</DIV>
<DIV dir=ltr style="RIGHT: auto">want to avoid delegating.</DIV>
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<DIV style="RIGHT: auto">It seems to me that there would be a lot more candidates under SODA. It's pretty hard to spoil the race and there is benefit to</DIV>
<DIV style="RIGHT: auto">be had in receiving some votes. It seems parliamentary that way. How many supporters is too few to consider running?</DIV></DIV></DIV></DIV></DIV></BLOCKQUOTE>
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<DIV class=yiv1812219107gmail_quote style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">Well, there is the 5% cutoff, below which your votes are automatically assigned for you.</DIV>
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<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">That's not really a punishment though. The candidate will probably get what they would've done anyway.</DIV>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif"> </DIV>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">I really think this is an issue that might need a rule of some kind. Why nominate one when you can nominate five? Anybody</DIV>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">who appeals to some segment of the electorate could help bring in votes. Can you imagine if, for example, the Republicans</DIV>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">were able to nominate every single one of their hopefuls for the presidency, with the knowledge that in the end all their votes</DIV>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">would probably pool together? You don't have to like Gingrich, you can vote for Cain. And maybe your vote will end up</DIV>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">with Gingrich, but without Cain you might not have cast it at all.</DIV>
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<DIV style="RIGHT: auto">(I have a simple rule for cutting down the number of candidates. I don't think I've ever mentioned it because I know how </DIV>
<DIV style="RIGHT: auto">idealistic you all are. Just say that the first-preference winner auto-wins if he has more first preferences than second and third</DIV>
<DIV style="RIGHT: auto">place combined. This can make it risky even to compete for third place. The idea is that voters should definitely then realize</DIV>
<DIV style="RIGHT: auto">which candidates are the top three in their race, which could amount to a viability/visibility boost for #3. My rule assumes </DIV>
<DIV style="RIGHT: auto">there's no equal-ranking, but I bet something could be devised for other ballots.)</DIV></DIV></DIV></DIV></DIV></BLOCKQUOTE>
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<DIV class=yiv1812219107gmail_quote style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">That rule doesn't sound too bad to me. Most of the time, there'd be no risk of it applying; but I think it would still be a gentle pressure in the intended direction. Still, I think it should be considered separately from SODA per se.</DIV></BLOCKQUOTE></BLOCKQUOTE>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">Maybe it would be gentle if you expect a lot of candidates but in general I don't think it is very gentle. For example, </DIV>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">this election:</DIV>
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<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">49 A</DIV>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">44 B</DIV>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">4 C>B</DIV>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">3 D>B</DIV>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif"> </DIV>
<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">Would qualify, and auto-elect A.</DIV>
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<DIV class=yiv1812219107gmail_quote dir=ltr style="FONT-SIZE: 12pt; RIGHT: auto; FONT-FAMILY: times new roman, new york, times, serif">Kevin</DIV>
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