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An impossibility theorem for paired comparisons

  • László CsatóEmail author
Original Paper

Abstract

In several decision-making problems, alternatives should be ranked on the basis of paired comparisons between them. We present an axiomatic approach for the universal ranking problem with arbitrary preference intensities, incomplete and multiple comparisons. In particular, two basic properties—independence of irrelevant matches and self-consistency—are considered. It is revealed that there exists no ranking method satisfying both requirements at the same time. The impossibility result holds under various restrictions on the set of ranking problems, however, it does not emerge in the case of round-robin tournaments. An interesting and more general possibility result is obtained by restricting the domain of independence of irrelevant matches through the concept of macrovertex.

Keywords

Preference aggregation Paired comparison Tournament ranking Axiomatic approach Impossibility 

Mathematics Subject Classification

15A06 91B14 

Notes

Acknowledgements

We thank Sándor Bozóki for useful advice. Anonymous reviewers provided valuable comments and suggestions on earlier drafts. The research was supported by OTKA grant K 111797 and by the MTA Premium Post Doctorate Research Program.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Laboratory on Engineering and Management Intelligence, Research Group of Operations Research and Decision Systems, Institute for Computer Science and ControlHungarian Academy of Sciences (MTA SZTAKI)BudapestHungary
  2. 2.Department of Operations Research and Actuarial SciencesCorvinus University of Budapest (BCE)BudapestHungary

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