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This note describes a method for adjusting uncertain future cash flows into a present certain equivalent. The use of net present value (NPV) to adjust a stream of future known cash flows into a single-value equivalent adjusted for the time value of money is common practice. The use of simulation to produce a risk profile of NPV values is also now common. While the expected net present value (ENPV) is often used to convert a risk profile of uncertain NPVs into a single-value equivalent, this approach ignores risk and the decision maker''s attitude toward risk. Simply put, a 50% probability of receiving an NPV of $1 million is not as attractive as a 100% chance of receiving an NPV of $500,000. The general logarithmic utility model (GLUM) constructs a single certain equivalent from a risk profile (i.e., a "risk-adjusted NPV") which goes beyond ENPV to incorporate risk aversion into the decision-making criterion. The simplicity and many attractive properties of the GLUM prompt us to suggest it as more attractive than other ways to adjust an NPV risk profile for risk.

涵蓋領域：

Models;Net present value rule;Quantitative analysis;Risk;Risk analysis

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