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Fair allocation of indivisible goods and chores

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Abstract

We consider the problem of fairly dividing a set of indivisible items. Much of the fair division literature assumes that the items are “goods” that yield positive utility for the agents. There is also some work in which the items are “chores” that yield negative utility for the agents. In this paper, we consider a more general scenario in which an agent may have positive or negative utility for each item. This framework captures, e.g., fair task assignment, where agents can experience both positive and negative utility for each task. We demonstrate that whereas some of the positive axiomatic and computational results extend to this more general setting, others do not. We present several new and efficient algorithms for finding fair allocations in this general setting. We also point out several gaps in the literature regarding the existence of allocations that satisfy certain fairness and efficiency properties and examine the complexity of computing such allocations.

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Notes

  1. A moving-knife procedure for computing a proportional allocation for a cake is known as the Dubins-Spanier moving-knife procedure [22].

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Acknowledgements

We would like to thank Bérczi et al. [12] and Bhaskar et al. [13] for pointing out an error in the IJCAI version [8]. We thank the IJCAI 2019 reviewers and Warut Suksompong for helpful feedback. Ayumi Igarashi is supported by the KAKENHI Grant-in-Aid for JSPS Fellows number 18J00997 and JST, PRESTO number JPMJPR20C1. Toby Walsh is funded by the European Research Council under the Horizon 2020 Programme via AMPLify 670077.

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Correspondence to Ayumi Igarashi.

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Aziz, H., Caragiannis, I., Igarashi, A. et al. Fair allocation of indivisible goods and chores. Auton Agent Multi-Agent Syst 36, 3 (2022). https://doi.org/10.1007/s10458-021-09532-8

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