Computer Science – Computer Science and Game Theory
Scientific paper
2009-09-17
Computer Science
Computer Science and Game Theory
38 pages, 2 figures
Scientific paper
Much work has been devoted, during the past twenty years, to using complexity to protect elections from manipulation and control. Many results have been obtained showing NP-hardness shields, and recently there has been much focus on whether such worst-case hardness protections can be bypassed by frequently correct heuristics or by approximations. This paper takes a very different approach: We argue that when electorates follow the canonical political science model of societal preferences the complexity shield never existed in the first place. In particular, we show that for electorates having single-peaked preferences, many existing NP-hardness results on manipulation and control evaporate.
Faliszewski Piotr
Hemaspaandra Edith
Hemaspaandra Lane A.
Rothe Joerg
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