A Public–private partnership unit (PPP unit) is an organisation responsible for promoting, facilitating and/or assessing Public-private partnerships (PPP, P3, 3P) in their territory. PPP units can be government agencies, or semi-independent organizations created with full or partial government support. Governments tend to create a PPP unit as a response to prior criticisms of the implementation of P3 projects in their country. In 2009, 50% of OECD countries had created a centralized PPP unit, and many more of these institutions exist in other countries.