Duffield, Colin, and Peter Raisbeck. 2007. Performance of PPPs and Traditional Procurement in Australia: Final Report to Infrastructure Partnerships Australia. Melbourne: The Allen Consulting Group and University of Melbourne.
"Key References: Infrastructure Challenges and How PPPs Can Help - Problems with Infrastructure"
Compares 21 PPP projects with 33 traditionally-procured infrastructure projects, finding that on average, PPPs have lower cost overruns and delays.