Download Public Money for Private Infrastructure: Deciding When to by Timothy Irwin PDF

By Timothy Irwin

Executive judgements are hardly pushed completely by means of the dictates of cost-benefit analyses. producing sturdy determination making approximately economic aid additionally calls for approaches for choice making that facilitate reliable research and mood the impact of self-interest. This file units out a framework meant to aid governments make larger judgements approximately giving monetary help for personal infrastructure providers and gives a few instruments to facilitate research. a number of rules to reinforce the collocation of knowledge, incentives, and judgements are proposed: • Giving accountability to humans engaged on the target (rather than the software or the infrastructure service); • setting apart selection making from supply; • concerning these answerable for charges; • using selection making boards that emphasize tradeoffs; • in many instances producing info on bills and merits; • Requiring regimen disclosure of knowledge; • Charging for specific sorts of help; and • making sure responsibility for judgements.

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Read or Download Public Money for Private Infrastructure: Deciding When to Offer Guarantees, Output-Based Subsidies, and Other Forms of Fiscal Support (World Bank Working Papers) PDF

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Extra info for Public Money for Private Infrastructure: Deciding When to Offer Guarantees, Output-Based Subsidies, and Other Forms of Fiscal Support (World Bank Working Papers)

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Compare and report the actual fiscal cost against estimated costs, evaluate performance, and penalize failures. Source: Allen and Tommasi (2001: 57). Routinely Generating Information on Costs and Benefits Frequently no one has very good information about the costs and benefits of government support. Because acquiring information is costly, it is not always better to be better informed. Yet governments cannot reliably make good decisions about fiscal support without information on its likely costs and benefits.

Making this assumption means that we need to estimate, or make guesses about, two parameters: the expected rate of growth and volatility (or the annualized standard deviation of the growth rate). The assumption of geometric Brownian motion is not the only possible assumption, but it keeps the analysis relatively simple and is often reasonably plausible. The evolution of a variable (x) that follows a geometric Brownian motion can be described mathematically as follows: ( dxt = xt µdt + σ dt Z˜t ) PUBLIC MONEY FOR PRIVATE INFRASTRUCTURE 43 where dxt is the incremental change in the variable (the incremental increase in revenue or new connections) at time t; m dt s Z˜ is the annual rate at which the variable is expected to grow; is an increment of time; is the annual volatility of the variable; and is a normally distributed random variable with a mean of 0 and a variance of 1.

Thus the guarantee can be approximated using the Black–Scholes formula for valuing European put options (see, for example, Hull 2003)—so long as we have an estimate of the volatility of the value of the option. One way to get such an estimate is to calculate the historical volatility of the equity of similar listed firms and to adjust these equity volatilities for leverage to get an estimate of the levered (or asset) volatility. com. The volatilities for listed infrastructure firms in the United States, in July 2002, range from around 15 percent for water utilities up to 40 percent for power-generation companies and more for telecom companies.

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