[EM] An interesting real election

Andrew Myers andru at cs.cornell.edu
Sat Jan 29 14:40:39 PST 2011


Here is an unusual case from a real poll run recently by a group using 
CIVS. Usually there is a Condorcet winner, but not this time. Who should 
win?

Ranked pairs says #1, and ranks the six choices as shown. It only has to 
reverse one preference. Schulze says #2, because it beats #6 by 15-11, 
and #6 beats #1 by 14-13. So #2 has a 14-13 beatpath vs. #1. Hill's 
method ("Condorcet-IRV") picks #6 as the winner.

-- Andrew

		1. 	2. 	3. 	4. 	5. 	6.
1.
		- 	13 	15 	17 	16 	13
2.
		9 	- 	13 	14 	17 	15
3. 		11 	11 	- 	13 	15 	14
4.
		9 	10 	10 	- 	14 	13
5.
		11 	10 	9 	10 	- 	13
6.
		14 	11 	11 	13 	10 	-

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.electorama.com/pipermail/election-methods-electorama.com/attachments/20110129/26da5633/attachment-0003.htm>


More information about the Election-Methods mailing list