they are more likely to make sense where they help address other issues including risk sharing technical expertise and project design and management a recent oecd survey found that the lack of adequate capacity for subnational governments to manage ppps was seen as a significant challenge by of responding oecd country governments oecd c governments wishing to expand the role of private finance in urban public investment may therefore need to address these capacity issues before proceeding very far for example by establishing dedicated ppp units that can work with local authorities oecd d