Efficiency and bid rigging in simultaneous procurement auctions under oligopolyHazak, Aaro; Kerikmäe, Tanel; Pärn-Lee, EvelinInternational Journal of Procurement Management (IJPM)2020 / p. 199–213 https://doi.org/10.1504/IJPM.2020.106512 Journal metrics at Scopus Article at Scopus