The behavioral revolution in economics has demonstrated that human beings often have difficulty making wise choices. The most widely chronicled difficulties arise for decisions made under conditions of uncertainty, those whose consequences unfold over significant amounts of time, and decisions...

Because of risk aversion, any sensible investment valuation system should value less Projects that contribute more to the aggregate risk, i.e., that have a larger income elasticity of net benefits. In theory, this is done by adjusting discount rates to consumption betas. But in reality, for...

Because of risk aversion, any sensible investment valuation system should value less projects that contribute more to the aggregate risk, i.e., that have a larger income elasticity of net benefits. In theory, this is done by adjusting discount rates to consumption betas. But in reality, for...

Hurricane Katrina did massive damage because New Orleans and the Gulf Coast were not appropriately protected. Wherever natural disasters threaten, the government - in its traditional role as public goods provider - must decide what level of protection to provide to an area. It does so by...