Many regulators have concluded that cost-benefit analysis is the best available method for capturing the welfare effects of regulations. It is therefore understandable that in recent years, some people have been interested in requiring financial regulators to engage in careful cost-benefit...

In the modern regulatory state, there is a serious tension between two indispensable ideas. The first is that it is important to measure, both in advance and on a continuing basis, the effects of regulation on social welfare, usually through cost-benefit analysis. The second idea, attributable...