Talk:Instant-runoff voting

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Voting methods criteria

@Affinepplan: as I read it, the voting methods criteria paragraph you removed was intended as an introduction to just what criteria are and why they matter, to familiarize readers who haven't read other voting method articles. As such, I think it would be useful to have some intro paragraph in the article. Do you have any opinion on what level of detail it ought to have? Wotwotwoot (talk) 12:19, 1 December 2024 (UTC)[reply]

Main article: Voting criteria

anything further would be plainly off-topic... this is an article about IRV. Affinepplan (talk) 21:53, 1 December 2024 (UTC)[reply]

I disagree, per WP:OBVIOUS (among other reasons). There needs to be some contextual prose provided as an intro to a jargon filled list. Even if one doesn't like the old intro, this intro to the "Voting method criteria" section of the IRV article should have something more than a link to Voting criteria, and provide a little context for why the section is there. -- RobLa (talk) 01:04, 2 December 2024 (UTC)[reply]

are you suggesting to add such a section into every single article on every single voting rule? Affinepplan (talk) 03:14, 2 December 2024 (UTC)[reply]

I'm pretty sure it's possible to make judgments on an article by article basis without falling down a slippery slope. For instance, it may be more useful to recap what criteria are in a relatively popular article like this one, than on say, an article about CPO-STV.

I'll make it short, though. Wotwotwoot (talk) 12:05, 2 December 2024 (UTC)[reply]

that works, thank you. Affinepplan (talk) 18:52, 2 December 2024 (UTC)[reply]

I think so, yes, although as mentioned above it should be kept short. – Closed Limelike Curves (talk) 18:59, 2 December 2024 (UTC)[reply]

Instant-runoff voting for the Smith set

Is there scientific research or any real-world use of a system that uses instant-runoff voting only if there is no Condorcet winner? That is, instant-runoff voting would be used to select among the candidates in the Smith set (or Schwartz set or Landau set). If so, I'd like to see it discussed in the article. If not, but there's research on why it is a bad idea, I'd like to see that mentioned in the article. — $Q$ uantling (talk | contribs) 17:16, 24 December 2024 (UTC)[reply]

The 2011 James Green-Armytage ref ("Four Condorcet-Hare Hybrid Methods for Single-Winner Elections") in the main article analyzes four of them. They are, using Green-Armytage's names:

- Woodall: Elect the Smith set member who was eliminated last by IRV.

- Benham: Repeatedly eliminate Plurality losers until there's a Condorcet winner (when considering only the remaining candidates). Elect this Condorcet winner.

- Smith-AV: Eliminate every candidate not in the Smith set. Then use IRV on the reduced set of candidates.

- Tideman: Tideman's alternative method. Alternate between eliminating every candidate not in the Smith set and eliminating the plurality loser. Elect the last candidate standing.

Off the top of my head, I'm not aware of any of these having been used in the real world, apart from the Condorcet Internet Voting Service. It supports the Benham method, which it calls Condorcet-IRV, and also supports another IRV-Condorcet hybrid method called Bottom-Two Runoff. Wotwotwoot (talk) 19:23, 24 December 2024 (UTC)[reply]