Fazekas, Mihály ORCID: https://orcid.org/0000-0002-8477-3961, Tóth, Bence, Wachs, Johannes ORCID: https://orcid.org/0000-0002-9044-2018 and Abdou, Aly (2025) Public procurement cartels : a large-sample testing of screens using machine learning. International Journal of Industrial Organization . DOI 10.1016/j.ijindorg.2025.103228