Comparison of indices of disproportionality in PR systems

• Main Author: Ion Bolun
• Format: Article
• Language: English
• Published: Institute of Mathematics and Computer Science of the Academy of Sciences of Moldova 2012-07-01
• Series: Computer Science Journal of Moldova
• Subjects: collective decisions; elections; proportional representation; index of disproportionality; comparative analysis
• Online Access: http://www.math.md/files/csjm/v20-n2/v20-n2-(pp246-271).pdf
• ISSN: 1561-4042

Comparative analysis of 12 indices of disproportionality by such characteristics as: metric, definition domain, representation uniformity, invariance and utilization field, is done. As a result of comparison, the opportunity to use as index of disproportionality in elections the Average relative deviation one is argued. Graphic representation for the upper limit of optimal solutions' disproportionality, when using this index, is shown.