Irwin, Timothy C. 2003. “Public Money for Private Infrastructure: Deciding When to Offer Guarantees, Output-Based Subsidies, and Other Fiscal Support.” Working Paper No. 10. Washington, DC: World Bank.
"Key References: Fiscal Analysis"
Section 6: “Comparing the Cost of Different Instruments” describes how governments can assess the cost of various types of fiscal support to PPPs—including output-based grants, in-kind grants, tax breaks, capital contributions,and guarantees.
'"Key References: Designing PPP Contracts"
Describes different payment mechanism for subsidies to infrastructure projects—including output-based payments and upfront capital subsidies—and how the government can decide which is most appropriate.