We discuss sources of cartel detection and investigate what it needs to have an effective leniency system. Which alternatives exist if leniency is not working in a country? This can include whistle-blower or anonymous informant systems, informant reward schemes, systematic screening and also market studies. Parallel pricing observations will be discussed. Another source to be tapped systematically can be attentive public procurement officials and systematic monitoring of e-procurement data. We will introduce the OECD Guidelines for Fighting Bid Rigging in Public Procurement and look at relevant case examples. Experts from OECD countries will introduce their cases and will exchange experiences with the participants. Practical exercises will complement the discussions.
