Campaign Management under Approval-Driven Voting Rules

Authors

  • Ildiko Schlotter Budapest University of Technology and Economics
  • Piotr Faliszewski AGH Univesity of Science and Technology
  • Edith Elkind Nanyang Technological University

Abstract

Approval-like voting rules, such as Sincere-Strategy Preference-Based Approval voting (SP-AV), the Bucklin rule (an adaptive variant of k-Approval voting), and the Fallback rule (an adaptive variant of SP-AV) have many desirable properties: for example, they are easy to understand and encourage the candidates to choose electoral platforms that have a broad appeal. In this paper, we investigate both classic and parameterized computational complexity of electoral campaign management under such rules. We focus on two methods that can be used to promote a given candidate: asking voters to move this candidate upwards in their preference order or asking them to change the number of candidates they approve of. We show that finding an optimal campaign management strategy of the first type is easy for both Bucklin and Fallback. In contrast, the second method is computationally hard even if the degree to which we need to affect the votes is small. Nevertheless, we identify a large class of scenarios that admit a fixed-parameter tractable algorithm.

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Published

2011-08-04

How to Cite

Schlotter, I., Faliszewski, P., & Elkind, E. (2011). Campaign Management under Approval-Driven Voting Rules. Proceedings of the AAAI Conference on Artificial Intelligence, 25(1), 726-731. Retrieved from https://ojs.aaai.org/index.php/AAAI/article/view/7870

Issue

Section

AAAI Technical Track: Multiagent Systems