{"type":"ScholarlyArticle","title":"Dynamic Proportional Rankings","authors":[{"name":"Jonas Israel","slug":"jonas-israel","given":"Jonas","family":"Israel","affiliation":""},{"name":"Markus Brill","slug":"markus-brill","given":"Markus","family":"Brill","affiliation":""}],"abstract":"Proportional ranking rules aggregate approval-style preferences of agents into a collective ranking such that groups of agents with similar preferences are adequately represented. Motivated by the application of live Q&A platforms, where submitted questions need to be ranked based on the interests of the audience, we study a dynamic extension of the proportional rankings setting. In our setting, the goal is to maintain the proportionality of a ranking when alternatives (i.e., questions)---not necessarily from the top of the ranking---get selected sequentially. We propose generalizations of well-known aggregation rules to this setting and study their monotonicity and proportionality properties. We also evaluate the performance of these rules experimentally, using realistic probabilistic assumptions on the selection procedure.","doi":"10.24963/ijcai.2021/37","url":"https://ijcai.org/proceedings/2021/37","pdf":"https://ijcai.org/proceedings/2021/0037.pdf","markdown":"https://ijcai.org/proceedings/2021/37.md","bibtex":"https://ijcai.org/proceedings/2021/bibtex/37","volume":{"slug":"2021","title":"Proceedings of the Thirtieth International Joint Conference on Artificial Intelligence","short_title":"IJCAI 2021","url":"https://ijcai.org/proceedings/2021/","year":2021,"location":"Montreal","dates":"19-27 August 2021","editors":"Prof. Zhi-Hua Zhou","isbn":"978-0-9992411-9-6","publisher":"International Joint Conferences on Artificial Intelligence Organization","doi_prefix":"10.24963/ijcai.2021"},"section":"Agent-based and Multi-agent Systems","track":"Main Track","number":37,"pages":{"first":261,"last":267},"keywords":["Agent-based and Multi-agent Systems: Computational Social Choice","Agent-based and Multi-agent Systems: Voting"],"videos":[],"references":[],"license_note":"Copyright International Joint Conferences on Artificial Intelligence."}