Between proportionality and diversity: Balancing district sizes under the Chamberlin-Courant rule

Piotr Faliszewski, Nimrod Talmon

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Scopus citations

Abstract

The Monroe and Chamberlin-Courant (CC) multiwinner rules proc eed by partitioning the voters into virtual districts and assigning a unique committee member to each district, so that the voters are as satisfied with the assignment as possible. The difference between Monroe and CC is that the former creates equal-sized districts, while the latter has no constraints. We generalize these rules by requiring that the largest district can be at most X times larger than the smallest one (where X is a parameter). We show that our new rules inherit worst-case computational properties from their ancestors; evaluate the rules experimentally (in particular, we provide their visualizations, analyze actual district sizes and voter satisfaction); and analyze their approximability.

Original languageEnglish
Title of host publication17th International Conference on Autonomous Agents and Multiagent Systems, AAMAS 2018
PublisherInternational Foundation for Autonomous Agents and Multiagent Systems (IFAAMAS)
Pages14-22
Number of pages9
ISBN (Print)9781510868083
StatePublished - 1 Jan 2018
Event17th International Conference on Autonomous Agents and Multiagent Systems, AAMAS 2018 - Stockholm, Sweden
Duration: 10 Jul 201815 Jul 2018

Publication series

NameProceedings of the International Joint Conference on Autonomous Agents and Multiagent Systems, AAMAS
Volume1
ISSN (Print)1548-8403
ISSN (Electronic)1558-2914

Conference

Conference17th International Conference on Autonomous Agents and Multiagent Systems, AAMAS 2018
Country/TerritorySweden
CityStockholm
Period10/07/1815/07/18

Keywords

  • Algorithms
  • Chamberlin-Courant
  • Diversity
  • Monroe
  • Multiwinner elections
  • Proportionality
  • Simulations

ASJC Scopus subject areas

  • Artificial Intelligence
  • Software
  • Control and Systems Engineering

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