Talk:Ranked Robin
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Misleading Title
The title is misleading. The term Robin voting has frequently been used for Condorcet methods in general. There is no reason why this term should refer to Copeland-Borda exclusively. MarkusSchulze (talk) 18:28, 17 November 2021 (UTC)
- I think the "#History" section of this article is (perhaps) a bit misleading, but I'm okay with a rebranding effort around Llull/Copeland/Condorcet methods, along with a descriptive name that doesn't borrow from the last name of a white guy. I think we need to get out of the habit of naming alternative voting systems after the people that "invented" them, since we're all standing on the shoulders of giants anyway. I may just make some changes to the history section to make it more chronological (starting with Ramon Llull's work rather than the most recent rebranding efforts of Condorcet-winner compliant methods). -- RobLa (talk) 20:06, 20 November 2021 (UTC)
- I don't think the problem is (not) borrowing names from white guys, but instead that both "ranked" and "robin" are very general terms, so that the name seems more like "ranked choice voting" than "instant-runoff voting". That is, Markus argues that it describes something that could (if you look at it right) apply to every Condorcet method, and thus it shouldn't have the sole right to the term. Kristomun (talk) 00:06, 23 November 2021 (UTC)
Comparison to Black's method
I'm curious how this method compares to the method called "Black's method" here on electowiki and on English Wikipedia? I seem to recall a discussion about this on the electionscience Discord server (or perhaps in one of the reddit threads), but I can't remember if it was Black or one of the others that Ranked Robin was most similar to. How should we categorize this method (other than as a generic system that meets the Condorcet winner criterion)? -- RobLa (talk) 02:12, 22 November 2021 (UTC)
- I seem to recall that this method is Copeland//Borda, whereas Black is Condorcet//Borda (or Condorcet,Borda; those are the same because there's only one CW). If I'm right, then that should probably be pointed out in the article. It lacks a quick summary of just what kind of method it is, like the first sentence of Black's method. Kristomun (talk) 00:06, 23 November 2021 (UTC)
- Ranked Robin uses ordinal ballots, so it can't be Score. The first degree tiebreaker states: "Declare the tied candidates finalists. For each finalist, subtract the number of votes preferring each other finalist from the number of votes preferring them over each other finalist. The finalist with the greatest total difference is elected." That is, for each finalist X, X's score is sum over other finalists Y: (number of voters preferring X to Y) - (number of voters preferring Y to X).
- Suppose that a candidate is ranked first on a complete (untruncated) ballot, among the finalists. Then it gets one point from that ballot for each other finalist. If the candidate is ranked kth, it would get one point for each finalist, minus (k-1) points for the ones ranked ahead. So its score from a ballot is linearly related to its position, which describes (I think) the weighted positional system of Borda. Kristomun (talk) 11:14, 12 January 2022 (UTC)
Clone dependence
Is the bit about the limited range of clone failures true? It'd seem to me that there are two types of clone failures that this could be subjected to: crowding (failing the Copeland component) and ordinary teaming inside the Smith set (failing the Borda component). For the latter, something along the lines of
12: A>B>C>D>E>F 11: B>C>A>D>E>F 10: C>A>B>D>E>F
The Copeland set is {A,B,C}. A and B tie for Borda score, and now the usual teaming tricks work, e.g.
12: A1>A2>B>C>D>E>F 11: B>C>A1>A2>D>E>F 10: C>A1>A2>B>D>E>F