Scale invariance: Difference between revisions
Add ordinal criterion, put both on a separate page.
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Scale invariance can refer to one of two criteria: a cardinal voting method criterion and an ordinal one.
#REDIRECT [[Cardinal voting systems#Scale%20invariance]]▼
{{Definition|Multiplying every ballot's score of every candidate by a constant <math>\alpha>0</math> should not change the outcome.}}
The ordinal method criterion is:
{{Definition|For every way of ranking the candidates, multiplying the number of voters who express this preference by a constant <math>\alpha>0</math> should not change the outcome.}}
Both criteria represent a desideratum that the method should not rely on absolute numbers when selecting a winner, just on the candidates' or factions' relative support.
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==References==
[[Category:Voting system criteria]]
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