Manipulating the Probabilistic Serial Rule
Abstract
The probabilistic serial (PS) rule is one of the most prominent randomized rules for the assignment problem. It is well-known for its superior fairness and welfare properties. However, PS is not immune to manipulative behaviour by the agents. We initiate the study of the computational complexity of an agent manipulating the PS rule. We show that computing an expected utility better response is NP- hard. On the other hand, we present a polynomial-time algorithm to compute a lexicographic best response. For the case of two agents, we show that even an expected utility best response can be computed in polynomial time. Our result for the case of two agents relies on an interesting connection with sequential allocation of discrete objects.
Cite
@article{arxiv.1501.06626,
title = {Manipulating the Probabilistic Serial Rule},
author = {Haris Aziz and Serge Gaspers and Simon Mackenzie and Nicholas Mattei and Nina Narodytska and Toby Walsh},
journal= {arXiv preprint arXiv:1501.06626},
year = {2015}
}
Comments
arXiv admin note: substantial text overlap with arXiv:1401.6523