PP-2012-05: Voter Response to Iterated Poll Information

PP-2012-05: Reijngoud, Annemieke and Endriss, Ulle (2012) Voter Response to Iterated Poll Information. [Report]

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We develop a formal model of opinion polls in elections and study how
they influence the voting behaviour of the participating agents, and
thereby election outcomes. This approach is particularly relevant to
the study of collective decision making by means of voting in
multiagent systems, where it is reasonable to assume that we can
precisely model the amount of information available to agents and
where agents can be expected to follow relatively simple rules when
adjusting their behaviour in response to polls. We analyse two
settings, one where a single agent strategises in view of a single
poll, and one where multiple agents repeatedly update their voting
intentions in view of a sequence of polls. In the single-poll setting
we vary the amount of information a poll provides and examine, for
different voting rules, when an agent starts and stops having an
incentive to manipulate the election. In the repeated-poll setting,
using both analytical and experimental methods, we study how the
properties of different voting rules are affected under different sets
of assumptions on how agents will respond to poll
information. Together, our results clarify under which circumstances
sharing information via opinion polls can improve the quality of
election outcomes and under which circumstances it may have negative
effects, due to the increased opportunities for manipulation it

Item Type: Report
Report Nr: PP-2012-05
Series Name: Prepublication (PP) Series
Year: 2012
Uncontrolled Keywords: computational social choice; voting theory; strategic manipulation; opinion polls
Subjects: Computation
Depositing User: Ulle Endriss
Date Deposited: 12 Oct 2016 14:37
Last Modified: 12 Oct 2016 14:37
URI: https://eprints.illc.uva.nl/id/eprint/447

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