Surprisingly Popular Voting Recovers Rankings, Surprisingly!

Hadi Hosseini, Debmalya Mandal, Nisarg Shah, Kevin Shi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations


The wisdom of the crowd has long become the de facto approach for eliciting information from individuals or experts in order to predict the ground truth. However, classical democratic approaches for aggregating individual votes only work when the opinion of the majority of the crowd is relatively accurate. A clever recent approach, surprisingly popular voting, elicits additional information from the individuals, namely their prediction of other individuals' votes, and provably recovers the ground truth even when experts are in minority. This approach works well when the goal is to pick the correct option from a small list, but when the goal is to recover a true ranking of the alternatives, a direct application of the approach requires eliciting too much information. We explore practical techniques for extending the surprisingly popular algorithm to ranked voting by partial votes and predictions and designing robust aggregation rules. We experimentally demonstrate that even a little prediction information helps surprisingly popular voting outperform classical approaches.

Original languageEnglish (US)
Title of host publicationProceedings of the 30th International Joint Conference on Artificial Intelligence, IJCAI 2021
EditorsZhi-Hua Zhou
PublisherInternational Joint Conferences on Artificial Intelligence
Number of pages7
ISBN (Electronic)9780999241196
StatePublished - 2021
Event30th International Joint Conference on Artificial Intelligence, IJCAI 2021 - Virtual, Online, Canada
Duration: Aug 19 2021Aug 27 2021

Publication series

NameIJCAI International Joint Conference on Artificial Intelligence
ISSN (Print)1045-0823


Conference30th International Joint Conference on Artificial Intelligence, IJCAI 2021
CityVirtual, Online

All Science Journal Classification (ASJC) codes

  • Artificial Intelligence


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