{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,24]],"date-time":"2025-09-24T00:15:00Z","timestamp":1758672900300,"version":"3.44.0"},"publisher-location":"California","reference-count":0,"publisher":"International Joint Conferences on Artificial Intelligence Organization","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,9]]},"abstract":"<jats:p>We study the complexity of candidate control in participatory budgeting elections. The goal of constructive candidate control is to ensure that a given candidate wins by either adding or deleting candidates from the election (in the destructive setting, the goal is to prevent a given candidate from winning). We show that such control problems are NP-hard to solve for many participatory budgeting voting rules, including Phragm\u00e9n and Equal-Shares, but there are natural cases with polynomial-time algorithms. We also argue that control by deleting candidates is a useful tool for assessing the performance (or, strength) of initially losing projects, and we support this view with experiments on real-life PB instances.<\/jats:p>","DOI":"10.24963\/ijcai.2025\/425","type":"proceedings-article","created":{"date-parts":[[2025,9,19]],"date-time":"2025-09-19T08:10:40Z","timestamp":1758269440000},"page":"3821-3829","source":"Crossref","is-referenced-by-count":0,"title":["Participatory Budgeting Project Strength via Candidate Control"],"prefix":"10.24963","author":[{"given":"Piotr","family":"Faliszewski","sequence":"first","affiliation":[{"name":"AGH University of Krakow"}]},{"given":"\u0141ukasz","family":"Janeczko","sequence":"additional","affiliation":[{"name":"AGH University of Krakow"}]},{"given":"Du\u0161an","family":"Knop","sequence":"additional","affiliation":[{"name":"Czech Technical University in Prague"}]},{"given":"Jan","family":"Pokorn\u00fd","sequence":"additional","affiliation":[{"name":"Czech Technical University in Prague"}]},{"given":"\u0160imon","family":"Schierreich","sequence":"additional","affiliation":[{"name":"Czech Technical University in Prague"}]},{"given":"Mateusz","family":"S\u0142uszniak","sequence":"additional","affiliation":[{"name":"AGH University of Krakow"}]},{"given":"Krzysztof","family":"Sornat","sequence":"additional","affiliation":[{"name":"AGH University of Krakow"}]}],"member":"10584","event":{"number":"34","sponsor":["International Joint Conferences on Artificial Intelligence Organization (IJCAI)"],"acronym":"IJCAI-2025","name":"Thirty-Fourth International Joint Conference on Artificial Intelligence {IJCAI-25}","start":{"date-parts":[[2025,8,16]]},"theme":"Artificial Intelligence","location":"Montreal, Canada","end":{"date-parts":[[2025,8,22]]}},"container-title":["Proceedings of the Thirty-Fourth International Joint Conference on Artificial Intelligence"],"original-title":[],"deposited":{"date-parts":[[2025,9,23]],"date-time":"2025-09-23T11:34:00Z","timestamp":1758627240000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ijcai.org\/proceedings\/2025\/425"}},"subtitle":[],"proceedings-subject":"Artificial Intelligence Research Articles","short-title":[],"issued":{"date-parts":[[2025,9]]},"references-count":0,"URL":"https:\/\/doi.org\/10.24963\/ijcai.2025\/425","relation":{},"subject":[],"published":{"date-parts":[[2025,9]]}}}