Which voting method always satisfies the monotonicity criterion?
A)pairwise comparison
B)Borda
C)plurality
D)Hare

Question

Quizplus · Accepted Answer

The monotonicity criterion states that if a candidate wins an election, and in a new election the only changes are changes that favor the winning candidate (such as receiving more votes), then the candidate should still win. The plurality voting method satisfies this criterion because if a candidate wins due to having the most votes, receiving even more votes in their favor in a subsequent election without changing the votes for other candidates will not change the outcome; the candidate will still win. Other methods like pairwise comparison, Borda, and Hare (also known as Single Transferable Vote or STV) can produce counterintuitive results where a candidate receiving additional support could change the outcome in a way that they do not win, thus not always satisfying the monotonicity criterion.

Which Voting Method Always Satisfies the Monotonicity Criterion