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Deviation_from_proportionality_adjusted_scale.PNG


Deviation_from_proportionality_adjusted_scale.PNG

The "deviation from proportionality" is a linear scale that measures the degree of unfairness of a given voting system from 0 to a higher number. A study of 24 councils in the United Kingdom came up with the result below:[1]

That study adjusted the score so that 0% was perfectly proportional and 100% was the most unproportional score possible in practice.[1]

References

  1. ↑ a b c d e f g "Proportional Representation in Local Government:An Analysis" Patrick Dunleavy (London School of Economics and Political Science), Helen Margetts (Department of Politics and Sociology, Birkbeck College, London), Report to the Joseph Rowntree Foundation, 15 April 1999

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Source Own work: Created by uploader on 4 May 2011 using Microsoft Paint and Microsoft Excel.
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