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Summary

Description
English: 3 voters (blue circles) and 3 candidates (red circles) in a 2-dimensional political space. The voters prefer candidates closest to themselves, leading to a circular societal preference of A > B > C > A... and no Condorcet winner.

Voter locations:

  • 1: (1, 1)
  • 2: (6, 3)
  • 3: (1, 7)

Candidate locations:

  • A: (2, 3)
  • B: (5, 1)
  • C: (4, 6)

Distances from voters to candidates:

  • 1: A = 2.2, B = 4.0, C = 5.8
  • 2: B = 2.2, C = 3.6, A = 4.0
  • 3: C = 3.2, A = 4.1, B = 7.2
Note that the distances are not equal/symmetrical. A score voting system with honest voters would select A as the winner, since A is closest to the centroid of the voters. See below.
Date
Source Own work
Author Votingstuff
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Score voting

Under Score voting, candidate A would win, as they are the closest to the centroid of voters. For instance, if the largest distance (7.2) is assigned a score of 0, and all voters vote proportionally to that distance on a scale of 0 to 6, the scores would be:

A B C
1 4 3 1
2 3 4 3
3 3 0 3
Total: 10 7 7

If instead the voters normalize their votes based on their own maximum and minimum distance, with the middle candidate scored proportionally, the results are:

A B C
1 6 3 0
2 0 6 1
3 5 0 6
Total: 11 9 7

Other ways of normalizing the scores also lead to A winning.

Licensing

I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
attribution share alike
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Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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8 January 2017

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Date/TimeThumbnailDimensionsUserComment
current19:11, 4 February 2018Thumbnail for version as of 19:11, 4 February 2018942 × 1,017 (43 KB)Omegatroncropped
18:46, 4 February 2018Thumbnail for version as of 18:46, 4 February 20181,092 × 1,063 (41 KB)OmegatronZoomed in for thumbnails
01:02, 9 January 2017Thumbnail for version as of 01:02, 9 January 2017419 × 419 (11 KB)VotingstuffUser created page with UploadWizard

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