UEFA Champions League entry has not satisfied strategy-proofness in three seasons.
Survey of sport ranking rules from a theoretical perspective can reveal their possible unintended consequences. This paper investigates the entry rules of the UEFA Champions League, the most prestigious club competition in European football with respect to the axiom of strategy-proofness. We find that in three seasons (2015-16, 2016-17, 2017-18), the UEFA Europa League titleholder might have an incentive to lose its match against the Champions League titleholder in their domestic championship. A straightforward solution is suggested in order to avoid the possible occurrence of this paradox. The use of an incentive compatible rule would have a real effect in these three seasons of the UEFA Champions League.
Publisher URL: http://arxiv.org/abs/1801.06644
DOI: arXiv:1801.06644v2
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