“…When noncontractable quality is marginal, the public buyer optimally chooses open competition combined with the threat of switching to restricted competition to eliminate poor-performing suppliers. Recently, Tukiainen et al (2021) proposed a choice experiment with real bureaucrats to isolate their preferences for desired levels of competition from its instrumental role of identifying of non-performing suppliers, as highlighted in the papers above. Public procurers do actually value some competition but have non-linear preferences that dissipate with additional bid submissions.…”