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Product Voting (PRO-V) is a [[Single Member system|Single-Winner]] [[Cardinal voting systems]] developed by [[User:Aldo Tragni|Aldo Tragni]]. |
Product Voting (PRO-V) is a [[Single Member system|Single-Winner]] [[Cardinal voting systems]] developed by [[User:Aldo Tragni|Aldo Tragni]]. |
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The objectives of this voting system is the balance between simplicity, resistance to strategies, elect utilitarian winner and provide the voter with a good representation of interests (range with 5 ratings). |
The objectives of this voting system is the balance between simplicity, resistance to strategies, elect utilitarian winner and provide the voter with a good representation of interests (range with 5 ratings). |
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===Name derivation=== |
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==Procedure== |
==Procedure== |
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Ballots: voter score each candidates with bonus in [x1,x2,x3,x4,x5] and the absence of evaluation is equivalent to x1. Candidates at the beginning all have 1 point. |
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Voter score candidates with ratings [1,2,3,4,5]. |
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Counting: bonuses are applied to each candidate (eg x3 means multiplying the candidate's points by 3), and the one with the highest score in the end wins. |
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===Formula=== |
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The |
The formula used in the count is the following: |
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<math>\begin{equation} |
<math>\begin{equation} |
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n = total number of votes. |
n = total number of votes. |
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If you have '''paper ballots''' then, before counting, you can eliminate ratings |
If you have '''paper ballots''' then, before counting, you can eliminate ratings x1 and those ratings that appear at least once on all candidates, even in different votes. |
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Eg given these 3 votes: |
Eg given these 3 votes: |
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A[ |
A[x1] B[x2] C['''x3'''] D['''x3'''] E[x5] |
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A[''' |
A['''x3'''] B[x5] C[x1] D[x2] E['''x3'''] |
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A[ |
A[x5] B['''x3'''] C[x2] D[x4] E[x1] |
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delete the ratings |
delete the ratings x1, and x3 that appears at least once on all candidates, making the votes like this: |
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B[ |
B[x2] E[x5] |
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B[ |
B[x5] D[x2] |
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A[ |
A[x5] C[x2] D[x4] |
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so there is less multiplication to do. |
so there is less multiplication to do. |
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===Ratings scale=== |
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The minimum value of the range is always x1. |
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In a context with very different options (such as the electoral context) it's better to use an exponential scale of this type: |
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[x1, x2, x4, x8, x16] |
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while in contexts with options not very far from each other (such as satisfaction surveys) it's better to use a linear scale of this type: |
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[x1, x2, x3, x4, x5] |
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Adapting the scale to the context allows the voter to represent their interests well, maintaining simplicity in the vote (which always has only 5 ratings) and also more resistance to strategies. |
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==Voting systems comparison== |
==Voting systems comparison== |