8:Ava>Cedric>Deegan>Bianca>Eli
6:Ava=Bianca=Cedric>Eli>Deegan
6:Eli>Ava>Bianca=Cedric=Deegan
6:Deegan>Bianca=Cedric>Eli>Ava
4:Bianca>Ava>Eli>Deegan>Cedric
3:Eli>Deegan>Bianca=Cedric>Ava
2:Deegan=Eli>Bianca=Cedric>Ava
preference matrix at https://electowiki.org/wiki/Ranked_Robin:
preference matrix at - https://www.cs.angelo.edu/~rlegrand/rbvote/calc.html
Ranks
G,B,P,R,O
18:1,5,4,2,3
12:5,1,4,3,2
10:5,2,1,4,3
9: 5,4,2,1,3
4: 5,2,4,3,1
2: 5,4,2,3,1
Ranks converted into Scores
G,B,P,R,O
18:5,1,2,4,3
12:1,5,2,3,4
10:1,4,5,2,3
9: 1,2,4,5,3
4: 1,4,2,3,5
2: 1,2,4,3,5
Voting Method and Winner
Plurality - Green
Two-Round Runoff- Blue
RCV IRV - Purple
Borda - Red
Range - Red
Approval - Red
Condorcet - Orange
STAR Voting - Orange
Here are my calculations: https://docs.google.com/document/d/1icQZ1efJV4XX7fD0_OTjNnW7uhfFV4lxbz5afTmqcyg/edit
ordered majority rule - Condorcet, IIA, monotonicity-not desirable properties ?!
A Majority Rule Philosophy for Instant Runoff Voting
https://arxiv.org/abs/2308.08430
Conclusions
IRV is the only voting method to satisfy ordered majority rule, which ensures the election of a candidate from the majority coalition while preventing opposition voters from influencing the choice of candidate from the faction they oppose. Ordered majority rule determines the relative social order between any two candidates by counting only ballots from those voters who do not prefer another major candidate, while ignoring all minor candidates.
Ordered majority rule is incompatible with the Condorcet criterion and independence of irrelevant alternatives because Condorcet and IIA demand that the relative social ranking between two candidates should depend on the relative social ranking of these candidates on all ballots. In addition, it is incompatible with monotonicity because monotonicity demands that if supporters of minor candidates have influence over lower ranked candidates, then supporters of major candidates should have equal or greater influence, while IRV does not grant influence over the social ranking of two candidates by voters who prefer a different major candidate. For situations where allowing supporters of a major candidate to have influence over the relative social ranking between other major candidates is deemed inappropriate, compliance with Condorcet, independence of irrelevant alternatives, and monotonicity are not desirable properties of a voting system.
My main objection - loss of expressive ballot.
Plurality voting is among the least expressive voting methods there is available.
2CV method seems to force voter to express opinion on two candidates only (lost expressiveness of the voting ballot).
You may very well have opinions about some or all of the candidates on a ballot, and yet you only get a say about two candidates only.
Other voting methods allow you to express yourself in different kinds of ways — for example:
Both STAR and RCV can fail to chose CW (Condorcet Winner).
How often does this happen?
Do we have any GitHub simulation software to flash it out (ideally with few example ballots).
Not sure what it is - but I never heard this term before - hence posting it here:
Is this factually correct - any comments, ideas?https://www.rankthevoteohio.org/rcv_is_not_a_condorcet_system
Are these the best explanations? Anything else worth reading?
https://www.starvoting.org/pass_fail
https://electionscience.org/library/later-no-harm-criterion/
https://en.wikipedia.org/wiki/Later-no-harm_criterion
https://www.rangevoting.org/LNH.html
A,B,C,D,E
8: 3,0,1,1,1
5: 0,4,0,0,0
2: 0,1,3,2,1
1: 0,2,5,4,3
Who is the Condorcet Looser (CL) and Condorect Winner (CW)?
How to build the Preference Matrix (find CW and CL) - Pairwise comparison.
Assume that election officials tossed a coin ahead of time - and the following Candidates were selected as tie breakers:
1. A
2. B
3. C
4. D
5. E
Tiebreaker candidates are selected from the above list, preferring candidates with lower numbers.
We have 4 seats to win (with 5 candidates) - who should win this election?
I would like to teak an existing Python RCV tabulation program to mark all the rankings (see below in red color) that have been ignored by RCV tabulation process (these are exhausted ballots). I want to be able to demonstrate to RCV folks how quickly and many exhausted ballots/rankings are ignored / discarded.
how to find programmatically:
https://www.rangevoting.org/IrvIgnoreExample.html - "the red parts of each ballot are ignored by the IRV process -
What would be the best algorithm to find the red parts?
@toby-pereira Is there a difference in an approach between Scoring (Cardinal/Rating) and Rankings (Ordinal) with equal ranks ?
Obviously the direction must be flipped
How to learn this lingo:
Pairwise Matrix
Pairwise preference
Pairwise preference - Strength of preference and rated pairwise preference ballot.
Ranked Pairs
Score Sorted Margins
Smith set vs Copeland set vs Schwartz set
Approval Sorted Margins
Pairwise Winner
Ranked Winners
Condorcet Winner (CW) / Loser (CL) / Improved Condorcet winner / Weak Condorcet loser
Improved Condorcet winner
Smith set vs Copeland set
Cardinal pairwise, cardinal-weighted pairwise (CWP) comparison
FairVote voting methods comparison: RCV, Approval, STAR, Range, Condorcet - thoughts, comments?
https://www.equal.vote/ranked_robin (the first bullet point related to Ranked Robin Disadvantages)
A ranked ballot doesn't allow voters to express their level of support; a 2nd choice ranking could be almost as good as a voter’s favorite or almost as bad as their last choice. This also makes it less straight-forward to look at the election results see how much support a candidate had overall, especially compared to methods like STAR Voting and Approval Voting.
I do not understand this part "A ranked ballot doesn't allow voters to express their level of support"
On the same page - Ranked Robin Advantages:
Expressive. Allowing voters to give equal rankings helps voters express a more nuanced opinion and reduces cognitive load compared to Ranked Choice Voting. Additionally, voters will still be able to assign a rank to every candidate even if there are more candidates than available ranks on the ballot.
My Question: is Ranked Robin expressive or not? I assume that Ranked Robin is as expressive as STAR. What am I missing?
I am looking for a numerical example where STAR voting fails Condorcet Winner criterion.
How to transform “STAR ballots" into "RCV ballots" - scenario where STAR Voting has equal scores / rating.
Option 1 seems to the most straightforward and easy to understand - ideas, and suggestions please?
See details at:
https://docs.google.com/document/d/1h0CQZ9wc46cb1Li7oKypqGBws_coOto3zQv3gpdV3LM/edit
Dear team,
I would like to sincerely apologize for my mistake regarding the graphics shared in the public forum.
I acknowledge that I did not follow the proper protocol for graphics in draft status and in private channels,
and
I also understand the importance of maintaining the context and consent when sharing someone else's work.
"Exhausted ballots are not counted in the Final RCV Round" versus "In STAR Voting all ballots are counted in both rounds".
I think we need a better explanation - I know what we mean with this graphic - but I feel that there is something wrong with our graphic (some logic shortcut / half truth).
How can we explain it in such a way that it is clear why we think that the graphic is accurate (see below a link to the graphic).
I know each model or graphic is a mental shortcut - but sometime a model / a graphic can go too far in simplifying something:
https://docs.google.com/document/d/1JMXJeJic5-5Ol97LuKs-o5OCY2TsZJfD4ow9xW40lvM/edit#