Here are my 5 cents on the topic - although the paper looks inside Bulgarian construction market, the approach could be easily replicated elsewhere, where detailed public procurement data is available. The other papers in the book (Government Favouritism in Europe: The Anticorruption report Volume 3, Edition: 1st, Barbara Budrich Publishers, Ed.: Alina Mungiu-Pippidi), also discuss the same topic - https://www.researchgate.net/publication/283517012_The_Bulgarian_Public_Procurement_Market_Corruption_Risks_and_Dynamics_in_the_Construction_Sector
Chapter The Bulgarian Public Procurement Market: Corruption Risks an...