ABSTRACT Bid rigging prevents public procurers from obtaining the best value for money. While public procurers are advised to be vigilant as to bid rigging in public markets, public procurement rules as well as administrative practices of public procurement authorities, are integral contributors to the formation and stability of bid rigging. By looking at factors facilitating bid rigging in public procurement, this article determines the extent to which current regulations and administrative practices of Vietnamese public procurers facilitate bid rigging. The findings reveal that Vietnamese public procurement legislation as well as administrative practices of public procurers unintentionally facilitate the formation and stability of bid rigging. Particularly concerning are unnecessary and excessive selection criteria leading to limited participation of bidders, regulation of joint-bidding, information disclosure and frequent communication between bidders. Responsive suggestions are accordingly made to tackle the problems identified. These findings provide valuable lessons for both Vietnamese and international policy-makers by emphasising the need for assessing the practical impact of public procurement rules and practices on bid rigging practices.

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公共采购规则和公共采购者的行政行为对操纵投标的影响：以越南为例

摘要 投标操纵阻碍了公共采购商获得最佳的资金价值。虽然建议公共采购人员警惕公开市场上的串通投标行为，但公共采购规则和公共采购部门的行政行为是串通投标形成和稳定的重要因素。本文通过考察在公共采购中促成操纵投标的因素，确定了越南公共采购者现行法规和行政实践在多大程度上促进了操纵投标。调查结果表明，越南公共采购立法以及公共采购人员的行政行为无意中促进了投标操纵的形成和稳定。尤其令人担忧的是，不必要和过多的选择标准导致投标人参与有限，联合投标受到监管，信息披露和投标人之间的频繁沟通。针对所发现的问题，提出相应的响应性建议。这些发现强调需要评估公共采购规则和实践对投标操纵行为的实际影响，为越南和国际决策者提供了宝贵的经验教训。