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Home / Proceedings / Proceedings of the AAAI Conference on Artificial Intelligence, 21

Computing Slater Rankings Using Similarities among Candidates

February 1, 2023

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Authors

Vincent Conitzer

DOI:


Abstract:

Voting (or rank aggregation) is a general method for aggregating the preferences of multiple agents. One important voting rule is the Slater rule. It selects a ranking of the alternatives (or candidates) to minimize the number of pairs of candidates such that the ranking disagrees with the pairwise majority vote on these two candidates. The use of the Slater rule has been hindered by a lack of techniques to compute Slater rankings. In this paper, we show how we can decompose the Slater problem into smaller subproblems if there is a set of similar candidates. We show that this technique suffices to compute a Slater ranking in linear time if the pairwise majority graph is hierarchically structured. For the general case, we also give an efficient algorithm for finding a set of similar candidates. We provide experimental results that show that this technique significantly (sometimes drastically) speeds up search algorithms. Finally, we also use the technique of similar sets to show that computing an optimal Slater ranking is NP-hard, even in the absence of pairwise ties.

Topics: AAAI

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Vincent Conitzer Computing Slater Rankings Using Similarities among Candidates Proceedings of the AAAI Conference on Artificial Intelligence, 21 (2006) 613.

Vincent Conitzer Computing Slater Rankings Using Similarities among Candidates AAAI 2006, 613.

Vincent Conitzer (2006). Computing Slater Rankings Using Similarities among Candidates. Proceedings of the AAAI Conference on Artificial Intelligence, 21, 613.

Vincent Conitzer. Computing Slater Rankings Using Similarities among Candidates. Proceedings of the AAAI Conference on Artificial Intelligence, 21 2006 p.613.

Vincent Conitzer. 2006. Computing Slater Rankings Using Similarities among Candidates. "Proceedings of the AAAI Conference on Artificial Intelligence, 21". 613.

Vincent Conitzer. (2006) "Computing Slater Rankings Using Similarities among Candidates", Proceedings of the AAAI Conference on Artificial Intelligence, 21, p.613

Vincent Conitzer, "Computing Slater Rankings Using Similarities among Candidates", AAAI, p.613, 2006.

Vincent Conitzer. "Computing Slater Rankings Using Similarities among Candidates". Proceedings of the AAAI Conference on Artificial Intelligence, 21, 2006, p.613.

Vincent Conitzer. "Computing Slater Rankings Using Similarities among Candidates". Proceedings of the AAAI Conference on Artificial Intelligence, 21, (2006): 613.

Vincent Conitzer. Computing Slater Rankings Using Similarities among Candidates. AAAI[Internet]. 2006[cited 2023]; 613.


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