Using interactive evolutionary computation (IEC) with validated surrogate fitness functions for redistricting

  • Authors:
  • Christine Chou;Steven Kimbrough;John Sullivan-Fedock;C. Jason Woodard;Frederic H. Murphy

  • Affiliations:
  • National Dong Hwa University, Hualien, Taiwan Roc;University of Pennsylvania, Philadelphia, PA, USA;University of Pennsylvania, Philadelphia, USA;Singapore Management University, Singapore, Singapore;Temple University, Philadelphia, PA, USA

  • Venue:
  • Proceedings of the 14th annual conference on Genetic and evolutionary computation
  • Year:
  • 2012

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Abstract

We describe a novel use of evolutionary computation to discover good districting plans for the Philadelphia City Council. We were able to discover 116 distinct, high quality, legally valid plans. These constitute a rich resource on which stakeholders may base deliberation. The exercise raised the issue of how to deal with large numbers of plans, especially with the aim of avoiding gerrymandering and promoting fairness. Interactive Evolutionary Computation (IEC) is a natural approach here, if practicable. The paper proposes development of Validated Surrogate Fitness (VSF) functions as a workable and generalizable form of IEC.