User:Psephomancy/2D election simulation examples: Difference between revisions

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File:2D election example with vote splitting and spoiler effect.png
[[File:2D election example with vote splitting and spoiler effect.png]]


This is an example simulation of an election on a 2-dimensional political spectrum (such as the Political Compass, Nolan chart, Pournelle chart, etc.)
This is an example simulation of an election on a 2-dimensional political spectrum (such as the Political Compass, Nolan chart, Pournelle chart, etc.)


There are 3000 voters (blue dots), 3 candidates (red dots), and voters vote honestly, supporting the candidates who are most similar to them ideologically (nearest distance).
There are 3000 voters (blue dots), 3 candidates (red dots), and voters vote honestly, supporting the candidates who are most similar to them ideologically (nearest distance).
*C is a partisan candidate on the right
*C, a partisan candidate, wins under [[First Past the Post electoral system|first-past-the-post voting]], since A and B split the votes of the left wing of the electorate.
** C wins under [[First Past the Post electoral system|first-past-the-post voting]], since A and B split the votes of the left wing of the electorate.
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*A, another partisan candidate, wins under [[Instant-runoff voting|Instant-Runoff Voting]] ("Ranked-Choice Voting"), after B is eliminated for not having enough first-preference votes, leaving A and C (and A is slightly closer to the center, so more people in the center support A over C).
*A is another partisan candidate, on the left
*B, a moderate candidate, and the best representative of the average voter, wins under [[Score Voting]] (with normalized ballots), as they are the highest-rated overall by the voters. B also wins under [[Condorcet method|Condorcet methods]], as B would beat both A and C in head-to-head elections.
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** A wins under [[Instant-runoff voting|Instant-Runoff Voting]] ("Ranked-Choice Voting"), after B is eliminated for not having enough first-preference votes, leaving A and C (and A is slightly closer to the center, so more people in the center support A over C).
*B is a moderate candidate, and the best representative of the average voter
** B wins under [[Score Voting]] (with normalized ballots), as they are the highest-rated overall by the voters.
** B also wins under [[Condorcet method|Condorcet methods]], as B would beat both A and C in head-to-head elections.

Revision as of 01:46, 25 September 2018

This is an example simulation of an election on a 2-dimensional political spectrum (such as the Political Compass, Nolan chart, Pournelle chart, etc.)

There are 3000 voters (blue dots), 3 candidates (red dots), and voters vote honestly, supporting the candidates who are most similar to them ideologically (nearest distance).

  • C is a partisan candidate on the right
  • A is another partisan candidate, on the left
    • A wins under Instant-Runoff Voting ("Ranked-Choice Voting"), after B is eliminated for not having enough first-preference votes, leaving A and C (and A is slightly closer to the center, so more people in the center support A over C).
  • B is a moderate candidate, and the best representative of the average voter
    • B wins under Score Voting (with normalized ballots), as they are the highest-rated overall by the voters.
    • B also wins under Condorcet methods, as B would beat both A and C in head-to-head elections.
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