"One example of what they have done is what they call a Congestion Management Program where everybody driving into central city pays a congestion fee and the idea there is to discourage people from driving, but take public transportation instead."

VOA: standard.2010.07.26

I call it the universal principle of risk management pooling and the hedging of risk.

我称之为,风险管理的普遍原则,风险汇聚和风险对冲

耶鲁公开课 - 金融市场课程节选