推波助澜的数学和物理博士，大多来自于麻省理工，斯坦福，哥大，卡内基梅隆，不好好在大学教书，去花街捞过界，赚大钱，组成一支Quants 军团。有的大学金融系教授就直接开对冲基金。钱他们都捞了，见大事不好就拍屁股走人。也不见有谁挺身而出，深刻自省，至少 Soul Searching 一番啊。！看看 what went wrong 啊？ 那个南开出生，大家拿深造的David Li (李香林？）据说是collateralized debt obligations CDO的创始人。 他的论文是 "On Default Correlation: A Copula Function Approach" (2000)
他是用Gaussian copula applied to CDOs 的第一人！结果各大银行纷纷采用它的理论。花旗银行重用他。他的数学模型可以把 CDOs being preciseily priced for various investments that were previously too complex to price, such as mortgages, 结果间接导致了今天的金危，现在大家都说 it was fundamentally flawed and a "recipe for disaster". !
"People got very excited about the Gaussian copula because of its mathematical elegance, but the thing never worked. Co-association between securities is not measurable using correlation"; in other words because past history is not predictive of the future.
听说目前李博士在北京高就。人在一生中能够这样呼风唤雨一次，也就足够了。
他的论文是 "On Default Correlation: A Copula Function Approach" (2000)
