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  4. The Distortion of Distributed Voting
 
conference paper

The Distortion of Distributed Voting

Filos-Ratsikas, Aris  
•
Micha, Evi
•
Voudouris, Alexandros A.
January 1, 2019
Algorithmic Game Theory (Sagt 2019)
12th International Symposium on Algorithmic Game Theory (SAGT)

Voting can abstractly model any decision-making scenario and as such it has been extensively studied over the decades. Recently, the related literature has focused on quantifying the impact of utilizing only limited information in the voting process on the societal welfare for the outcome, by bounding the distortion of voting rules. Even though there has been significant progress towards this goal, all previous works have so far neglected the fact that in many scenarios (like presidential elections) voting is actually a distributed procedure. In this paper, we consider a setting in which the voters are partitioned into disjoint districts and vote locally therein to elect local winning alternatives using a voting rule; the final outcome is then chosen from the set of these alternatives. We prove tight bounds on the distortion of well-known voting rules for such distributed elections both from a worst-case perspective as well as from a best-case one. Our results indicate that the partition of voters into districts leads to considerably higher distortion, a phenomenon which we also experimentally showcase using real-world data.

  • Details
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Type
conference paper
DOI
10.1007/978-3-030-30473-7_21
Web of Science ID

WOS:000525349600021

Author(s)
Filos-Ratsikas, Aris  
Micha, Evi
Voudouris, Alexandros A.
Date Issued

2019-01-01

Publisher

SPRINGER INTERNATIONAL PUBLISHING AG

Publisher place

Cham

Published in
Algorithmic Game Theory (Sagt 2019)
ISBN of the book

978-3-030-30473-7

978-3-030-30472-0

Series title/Series vol.

Lecture Notes in Computer Science

Volume

11801

Start page

312

End page

325

Subjects

Computer Science, Artificial Intelligence

•

Computer Science, Theory & Methods

•

Computer Science

•

distributed voting

•

district-based elections

•

distortion

•

social choice functions

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LIA  
Event nameEvent placeEvent date
12th International Symposium on Algorithmic Game Theory (SAGT)

Athens, GREECE

Sep 30-Oct 03, 2019

Available on Infoscience
April 24, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/168359
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