[EM] Two round Condorcet (or maybe 1.01 round)

Juho Laatu juho.laatu at gmail.com
Thu Sep 23 00:39:22 PDT 2021

What do you think of this rather simple method?

(1) Arrange a Condorcet election
(2) If there is a a Condorcet winner / no top loop / no tie, elect the first round winner
(3) Otherwise arrange a second round, using the same Condorcet variant, and elect the second round winner

The idea is to encourage sincere voting at the first round. And to reduce the need for defensive strategic voting at the first round, against strategies that make use of creating a top loop. And to discourage people that are planning to win by voting strategically.

Rule (2) could be also such that any first round winner will be elected, unless there is a formal request to arrange the second round. The request should maybe be based on a claim that there indeed was insincere voting that may have influenced the outcome.

In rule (2) a tie / no Condorcet winner could mean also having multiple equally strong winners. Maybe we would go automatically to the second round in this case (instead of picking one of the winners at random), even if there was no insincere voting.

Round two uses the same (sub)method as in the first round to remove any interest of trying to go to the second round because of better chances of winning with that (sub)method.

BR, Juho

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