Deviation from proportionality

Deviation from proportionality

The main function of deviation from proportionality is to denote the proportion of malapointment in a democratic process. The idea is basically a mathematical relationship between the percentage of votes obtained by a political party and the percentage of parliamentary seats allocated to it.

To calculate just subtract a parties’ vote share from their seat share, add up all of the absolute values (i.e. ignore negative signs), and finally divide by two[1].

References

  1. ^ There are three main ways of measuring deviations from proportionality:

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