Conventional cost-benefit analysis incorporates the normally reasonable assumption that the policy or project under examination is marginal in the sense that it will not significantly change relative prices. In particular, it is assumed that the policy or project does not change the underlying...

To what extent does economic analysis of climate change depend on low-probability, high-impact events? This question has received a great deal of attention lately, with the contention increasingly made that climate damage could be so large that societal willingness to pay to avoid extreme...

In this article the author relates about the uncertainty of any proposed investment or government policies. Taking in account this situation, it is necessary to do an analysis of proposed projects for implementation and from multiple choices to choose the project that is most advantageous. This...

Should governments, in discounting the future benefits and costs of public projects, use a discount rate that declines over time? The argument for a declining discount rate is a simple one: if the discount rates that will be applied in the future are persistent, and if the analyst can assign...

These are a series of color slides and exercises for providing key elements of an Introduction to Benefit/Cost and Project Analysis. There are five parts or sections. Part 1 provides an Introduction to Compounding and Discounting. Part 2 outlines a method for determining project worth. Part 3...

There is much disagreement about the discount rate. The prescriptive approach derives the discount rate from utility functions, growth models and ethical considerations. The descriptive approach stresses the opportunity cost of capital, but struggles to define which market rates to average. Both...

Weitzman (1998) showed that when future interest rates are uncertain, using the expected net present value implies a term structure of discount rates that is decreasing to the smallest possible interest rate. On the contrary, using the expected net future value criterion implies an increasing...

It is not immediately clear how to discount distant-future events, like climate change, when the distant-future discount rate itself is uncertain. The so-called Weitzman-Gollier puzzle is the fact that two seemingly symmetric and equally plausible ways of dealing with uncertain future discount...

Gollier and Weitzman (2010) show that if future consumption discount rates are uncertain and persistent, the consumption discount rate should decline to its lowest possible value for events in the most distant future. In this paper, I argue that the lowest possible growth rate of consumption per...

The “Stern Review: The Economics of Climate Change” reached conclusions and policy recommendations dramatically different from most of the earlier economic analyses of climate change. It found that the costs of climate change, as well as the potential net benefits of greenhouse gas...