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

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There are 3000 voters (black dots), 3 candidates (colored dots), and voters vote honestly, supporting the candidates who are most similar to them ideologically (nearest distance).
*C (green) is a partisan candidate on the right
*A (blue) is another partisan candidate, this time on the left
*B (orange) is a moderate candidate, and the best representative of the average voter
 
== FPTP ==
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== IRV ("RCV") / Exhaustive Ballot ==
 
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. (A is slightly closer to the center, so more people in the center support A over C.)
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|colors=#1f77b4, #ff7f0e, #2ca02c
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|colors=#1f77b4, #ff7f0e, #2ca02c
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[[W:Exhaustive ballot|Exhaustive ballot]] behaves the same way, since it uses the same elimination rule as IRV, only held using multiple single-mark ballot runoffs instead of using a ranked ballot.
 
== Top-two runoff / Open primary / Contingent Vote ==
 
A wins under [[Runoff voting|top-two runoff]] or an [[W:Nonpartisan blanket primary|open primary]]. BA isand eliminatedC inhave the first round for not having enough first-preferencemost votes, leavingand A vs Cproceed into the runoff. (None of the candidates gets over 50% in the first round.) A is slightly closer to the center, so more people in the center support A over C in the runoff.
 
First round is the same as plurality:
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{{Graph:Chart|width=200|height=150
|xAxisTitle=Candidates|yAxisTitle=Votes [%]|type=rect
|x=A, B, C
|y=103134.37, 86128.70, 110836.93
|colors=#1f77b4, #ff7f0e, #2ca02c
}}
 
 
 
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{{Graph:Chart|width=200|height=150
|xAxisTitle=Candidates|yAxisTitle=Votes [%]|type=rect
|x=A, B, C
|y=161953.97, 0.00, 1381 46.03
|colors=#1f77b4, #ff7f0e, #2ca02c
}}
[[W:Contingent vote|Contingent vote]] behaves the same way, except the runoff election is held automatically based on ranked ballots.
 
== Score ==
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[[File:2D election example Scores for A, B, C.png|800x800px]]
 
B wins under [[Score Voting]] (with normalized ballots), as they are the highest-rated overall by the voters. (Dark-colored voters gave that candidate a maximum score, white-colored voters gave them a minimum score.)
 
{{Graph:Chart|width=200|height=150
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|colors=#1f77b4, #ff7f0e, #2ca02c
}}