Public-private partnerships (PPPs) operate at the boundary of the public and private sectors, being neither fully public nor fully private. PPPs are defined in this paper as privately financed infrastructure projects in which a private firm either: (i) sells its services to the government; or...

When governments seek private investment in infrastructure projects, they usually find themselves asked to provide grants, guarantees, or other forms of fiscal support. Often they prefer to provide support in ways that limit immediate cash expenditure but sometimes generate large costs later....