Proceedings Abstracts of the Twenty-Fourth International Joint Conference on Artificial Intelligence

The Complexity of Manipulative Attacks in Nearly Single-Peaked Electorates (Extended Abstract) / 4178
Piotr Faliszewski, Edith Hemaspaandra, Lane A. Hemaspaandra

Many electoral control and manipulation problems — which we will refer to in general as manipulative actions problems — are NP-hard in the general case. Many of these problems fall into polynomial time if the electorate is single-peaked, i.e., is polarized along some axis/issue. However, real-world electorates are not truly single-peaked — for example, there may be some maverick voters — and to take this into account, we study the complexity of manipulative-action algorithms for the case of nearly single-peaked electorates.