# A formula goes to court: Partisan gerrymandering and the efficiency gap

- Published in 2017
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Recently, a proposal has been advanced to detect unconstitutional partisan gerrymandering with a simple formula called the efficiency gap. The efficiency gap is now working its way towards a possible landmark case in the Supreme Court. This note explores some of its mathematical properties in light of the fact that it reduces to a straight proportional comparison of votes to seats. Though we offer several critiques, we assess that EG can still be a useful component of a courtroom analysis. But a famous formula can take on a life of its own and this one will need to be watched closely.

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@article{AformulagoestocourtPartisangerrymanderingandtheefficiencygap, title = {A formula goes to court: Partisan gerrymandering and the efficiency gap}, abstract = {Recently, a proposal has been advanced to detect unconstitutional partisan gerrymandering with a simple formula called the efficiency gap. The efficiency gap is now working its way towards a possible landmark case in the Supreme Court. This note explores some of its mathematical properties in light of the fact that it reduces to a straight proportional comparison of votes to seats. Though we offer several critiques, we assess that EG can still be a useful component of a courtroom analysis. But a famous formula can take on a life of its own and this one will need to be watched closely.}, url = {http://arxiv.org/abs/1705.10812v1 http://arxiv.org/pdf/1705.10812v1}, author = {Mira Bernstein and Moon Duchin}, comment = {}, urldate = {2017-06-16}, archivePrefix = {arXiv}, eprint = {1705.10812}, primaryClass = {physics.soc-ph}, year = 2017, collections = {Protocols and strategies,Geometry} }