Whereas the previous chapter introduced dedicated PPP units and their general functions across OECD member countries, this chapter examines the institutional architecture surrounding the procurement of public-private partnership projects in five case studies: Germany, Korea, the United Kingdom, the State of Victoria (Australia) and South Africa. These countries have been selected based on their respective experience with public-private partnerships and different country characteristics. All five countries have over ten years of experience with public-private partnerships. The volume and value of their projects range from 19 worth EUR 1.9 billion in South Africa to 450 projects worth EUR 43.3 billion in the United Kingdom (see Table 2.1). The sample includes four OECD member countries and one non-member country; three unitary and two federal countries; as well as four central and one sub-national/state governments.