Talk:Participation criterion

Untitled
What's the difference between the Participation and Monoticity criteria? Can someone think of an example where all Condorcet methods fail Participation? Why is it named Participation?


 * It has been proven by Hervé Moulin ("Condorcet's Principle Implies the No Show Paradox", Journal of Economic Theory, vol. 45, no. 1, pp. 53-64, 1988) that the participation criterion and the Condorcet criterion are incompatible. A summary of his proof is here. Markus Schulze 22:58, 27 January 2006 (UTC)


 * Actually, the link that works for me is here. I suspect the version of mailman changed and the ids changed; if it happens again, the URL gives the month and the post is titled "Condorcet and Participation", by Marcus Schulze. Homunq (talk) 20:35, 22 June 2009 (UTC)


 * Thanks! That's a delightfully complicated proof.  Paladinwannabe2 20:15, 23 October 2007 (UTC)

Participation v Monotonicity
The difference between participation and monotonicity is that participation relates to the addition of new ballots. Monotonicity relates to changes to existing ballots.

Relatively confusing
I've been reading the various pages on voting theory, and I must admit, this particular page (Participation Criteria) seems confusing. Is there any chance that it can be made a little more accessible? Once I understand it better, I will try to offer more concrete suggestions.


 * Well, the basic idea is that all possible sincere votes that a voter could cast should get a result that is at least as good as the result he gets when he just stays home. KVenzke 15:07, 10 May 2007 (UTC)

Examples
REMOVED THESE EMPTY SECTIONS (to be restored when fleshed out) Tom Ruen (talk) 01:22, 28 June 2008 (UTC)

Schulze method
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Weak-Participation
It seems to me that there should be a weaker version of Participation that says that a newly-added ballot shouldn't cause the defeat of a candidate whom it votes over every one of the other candidates.

Making that candidate lose by showing up and voting is much worse than just causing some lower choice to lose to a still lower choice.

Instant-Runoff wouldn't fail that Weak-Participation. Majority-Judgment and Condorcet would still fail it. — Preceding unsigned comment added by 65.8.176.249 (talk) 16:12, 13 November 2012 (UTC)
 * That criterion appears to be original research and/or another name for the Mono-Add-Top criterion, so I am removing it. 85.165.58.214 (talk) 14:50, 17 February 2013 (UTC)

Request: Merge all Condorcet methods
Condorcet methods are always incompatible with participation, i.e. we only need one example/proof for all Condorcet methods. Closed Limelike Curves (talk) 07:24, 28 February 2024 (UTC)

source for all highest median methods fail insufficient
https://en.m.wikipedia.org/w/index.php?title=Participation_criterion&oldid=1209710961

The source given here for highest median methods seems very exclusive to the bucklin method Sirati97 (talk) 18:03, 18 March 2024 (UTC)