[EM] "Total Vote Runoff"

[Bob Richard (lists)]

If Robert (or anyone else) can demonstrate that this is not Condorcet, 
they should let Foley know pronto. He is a Condorcet enthusiast.

The method appears to be to eliminate the current Borda loser in each 
round, until one remaining candidate has a majority. Or something very 
close to that. Foley is a lawyer, not a social choice theorist, and his 
explanations are a little hard to follow.

--Bob Richard

------ Original Message ------
>From "robert bristow-johnson" <rbj at audioimagination.com>
To election-methods at lists.electorama.com
Date 1/20/2023 7:01:44 PM
Subject Re: [EM] "Total Vote Runoff"

>
>
>>  On 01/20/2023 8:11 PM EST Bob Richard (lists) <lists001 at robertjrichard.com> wrote:
>>
>>
>>   Law professor Ned Foley has proposed what he seems to think is a new Concorcet-compliant method. He calls it "total vote runoff". My guess is that it has in fact been discussed on this list under another name. I am I right, and (if so) what do the members of this list call it?
>>
>>https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4328946
>>
>>  Here is the summary description:
>>
>>  "Total Vote Runoff (TVR) is an electoral system designed to be identical to Instant Runoff Voting (IRV), which is the most commonly understood and implemented form of Ranked Choice Voting in the United States, except for one key detail. Like IRV, TVR sequentially eliminates the weakest candidate on the ranked-choice ballot when no candidate is ranked first on a majority of ballots. Unlike IRV, however, TVR identifies the weakest candidate to be eliminated based on the total votes each candidate receives on all the ballots, rather than just the number of first-place votes (as IRV does). A candidate’s total votes from each ballot is defined as the number of other candidates the candidate is ranked higher than on the ballot — as being ranked higher than another candidate is equivalent to securing a vote against that candidate, given that ranked-choice ballots can be conceived as mathematically equivalent to a round-robin election among all the candidates on the ballot. "
>
>I don't see how this makes it Condorcet consistent.
>
>--
>
>r b-j . _ . _ . _ . _ rbj at audioimagination.com
>
>"Imagination is more important than knowledge."
>
>.
>.
>.
>----
>Election-Methods mailing list - see https://electorama.com/em for list info
>