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arXiv · 1509.02424

Parliamentary Voting Procedures: Agenda Control, Manipulation, and Uncertainty

Robert Bredereck·Jiehua Chen·Rolf Niedermeier·Toby Walsh
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Abstract

We study computational problems for two popular parliamentary voting procedures: the amendment procedure and the successive procedure. While finding successful manipulations or agenda controls is tractable for both procedures, our real-world experimental results indicate that most elections cannot be manipulated by a few voters and agenda control is typically impossible. If the voter preferences are incomplete, then finding which alternatives can possibly win is NP-hard for both procedures. Whilst deciding if an alternative necessarily wins is coNP-hard for the amendment procedure, it is polynomial-time solvable for the successive one.

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Robert Bredereck, Jiehua Chen, Rolf Niedermeier, Toby Walsh. 2015-09-08. Parliamentary Voting Procedures: Agenda Control, Manipulation, and Uncertainty. https://arxiv.org/abs/1509.02424

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