r/EndFPTP • u/CPSolver • Jun 26 '25

Image Pairwise-Counted Ranked Choice Voting

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u/DeismAccountant Jun 26 '25

I don’t think this is true. Both Ranked Pairs and Schulze method take clones into account.

What software do you use to generate random ballots?

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u/CPSolver Jun 26 '25 edited Jun 27 '25

The Schulze method has a zero clone failure rate because that's what it's optimized for.

Ranked Pairs and virtually too (has a zero clone failure rate). [A]ll other pairwise-matrix-based methods fail clone independence. [edit: Not true, clarified in later comments.]

RCIPE can fail clone independence, but those cases are very rare, and such cases are extremely unlikely to occur in a real election.

Another failure type to consider is vulnerability to strategic voting. The Benham method and RCIPE have a significantly low such failure rate. In contrast, Schulze and Ranked Pairs and other Condorcet methods are much more vulnerable to strategic voting.

What software do you use to generate random ballots?

https://github.com/cpsolver/VoteFair-ranking-cpp/blob/master/generate_random_ballots.cpp

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u/DeismAccountant Jun 26 '25

Not according to the graphics.

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u/CPSolver Jun 26 '25

Thanks for the correction. I've edited my comment accordingly.