File:Voting Paradox example.png

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file (942 × 1,017 pixels, file size: 43 KB, MIME type: image/png)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]
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
Other versions
This math image could be re-created using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{vector version available|new image name}}.


It is recommended to name the SVG file “Voting Paradox example.svg”—then the template Vector version available (or Vva) does not need the new image name parameter.

Score voting

[edit]

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

[edit]
I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
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.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current19:11, 4 February 2018Thumbnail for version as of 19:11, 4 February 2018942 × 1,017 (43 KB)Omegatron (talk | contribs)cropped
18:46, 4 February 2018Thumbnail for version as of 18:46, 4 February 20181,092 × 1,063 (41 KB)Omegatron (talk | contribs)Zoomed in for thumbnails
01:02, 9 January 2017Thumbnail for version as of 01:02, 9 January 2017419 × 419 (11 KB)Votingstuff (talk | contribs)User created page with UploadWizard

There are no pages that use this file.

File usage on other wikis

The following other wikis use this file:

Metadata