Analysis of the Ballot Shuffling Attack on Irish ballot counting for Proportional Representation by Single Transferable Vote (PR-STV)

Dermot Robert Cochran

    Research output: Book / Anthology / Report / Ph.D. thesisReportResearch

    Abstract

    The current Irish legislation for counting of ballots does not fully comply with the true meaning of proportional representation by single
    transferable vote. This is due to the way in which second and
    subsequent transfers are handled, the legislative requirement to only count the last set of ballots transferred and the sensitivity of the counting algorithm to the order in which ballots are shuffled. A formal model of PR-STV is used to identify scenarios in which the counting under current electoral laws gives a different result compared to what would have happened using another ordering of the same ballots.
    Original languageEnglish
    Number of pages23
    ISBN (Electronic)978-87-7949-352-0
    Publication statusPublished - Aug 2015
    SeriesITU Technical Report Series
    NumberTR-2015-188
    ISSN1600-6100

    Keywords

    • Irish legislation
    • Proportional representation
    • Single transferable vote
    • Counting algorithm
    • Electoral laws

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