The wide range of experience with PPPs offers some guidance from which New York's public officials can benefit in deciding whether and how to apply the strategy to local infrastructure. The CBC staff has reviewed a variety of studies and other evidence relating to PPP ventures with particular emphasis on the limited experience in the United States and the more extensive experience in the United Kingdom, where project outcomes have been studied carefully. This "real world" evidence- as opposed to more ideologically based assertions- provides the basis for three important guidelines that should inform the application of PPPs.