Mitigating the risk of tanking in multi-stage tournaments
Multi-stage tournaments consisting of a round-robin group stage followed by a knockout phase are ubiquitous in sports. However, this format is incentive incompatible if at least 2 teams from a group advance to the knockout stage where the brackets are predetermined. A model is developed to quantify...
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| Veröffentlicht in: | Annals of operations research 2025, Vol.344 (1), p.135-151 |
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| description | Multi-stage tournaments consisting of a round-robin group stage followed by a knockout phase are ubiquitous in sports. However, this format is incentive incompatible if at least 2 teams from a group advance to the knockout stage where the brackets are predetermined. A model is developed to quantify the risk of tanking in these contests. The suggested approach is applied to the 2022 FIFA World Cup to uncover how its design could have been improved by changing group labelling (a reform that has received no attention before) and the schedule of group matches. Scheduling is found to be a surprisingly weak intervention compared to previous results on the risk of collusion in a group. The probability of tanking, which is disturbingly high around 25%, cannot be reduced by more than 3 percentage points via these policies. Tournament organisers need to consider more fundamental changes against tanking. |
| doi_str_mv | 10.1007/s10479-024-06311-y |
| format | Article |
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| subjects | Badminton Business and Management Collusion Combinatorics Design Labeling Operations research Operations Research/Decision Theory Original Research Risk Scheduling Soccer Tennis Theory of Computation Tournaments & championships |
| title | Mitigating the risk of tanking in multi-stage tournaments |
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