For cost-benefit analyses (CBA) of public-sector projects, a common misconception is that the discount rate should include a risk premium in consonance with the private-sector practice of doing so. In examining the issue, this report addresses different types of risk separately including downside risk, which arises from optimistic bias in forecasts and pure risk, which is the variation remaining around the mean after removing downside biases.

• Risk in Cost-Benefit Analysis
  

  report 110 [PDF: 1.27 MB]