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arXiv · 2608.26478

Unpublished Draft: A Post-Processing Approach to Fairness in Tie-Aware Rankings

Somya Nigam·Johan Springael·Kenneth Sörensen
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Abstract

The problem of finding a fair consensus ranking is an active research topic in the domain of fair rank aggregation and has been well studied; however, existing studies predominantly consider both the input rankings and the output ranking to be permutations where elements are always strictly ordered. In practice, however, a ranking with ties is far more common. This study bridges this gap by presenting a post-processing approach to determine the closest fair consensus ranking when an unfair tie-aware consensus ranking is provided. It proposes an exact algorithm and a fast heuristic to achieve this.

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Somya Nigam, Johan Springael, Kenneth Sörensen. 2026-08-27. Unpublished Draft: A Post-Processing Approach to Fairness in Tie-Aware Rankings. https://arxiv.org/abs/2608.26478

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