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David X. Li David X. Li (born in China in the 1960s as 〔) is a quantitative analyst and a qualified actuary who in the early 2000s pioneered the use of ''Gaussian copula'' models for the pricing of collateralized debt obligations (CDOs). The ''Financial Times'' called him "the world’s most influential actuary", while in the aftermath of the global financial crisis of 2008–2009, to which Li's model has been credited partly to blame,〔〔 his model has been called a "recipe for disaster".〔 ==Biography== Li was born as Li Xianglin and raised in a rural part of China during the 1960s;〔 his family had been relocated during the Cultural Revolution to a rural village in southern China for "re-education".〔 Li was talented and with hard work he received a master's degree in economics from Nankai University, one of the country’s most prestigious universities.〔 After leaving China in 1987 at the behest of the Chinese government to learn more about capitalism from the west,〔 he earned an MBA from Laval University in Quebec, and an MMath in Actuarial Science and PhD in statistics from the University of Waterloo in Ontario〔 in 1995 with thesis title ''An estimating function approach to credibility theory'' under the supervision of Harry H. Panjer. At this point he changed his name to David X. Li.〔 His financial career began in 1997 at Canadian Imperial Bank of Commerce World Markets division.〔 He eventually moved to New York City and in 2000, he was a partner in J.P. Morgan's RiskMetrics unit. By 2003 he was director and global head of credit derivatives research at Citigroup.〔 In 2004 he moved to Barclays Capital and headed up the credit quantitative analytics team.〔 In 2008 Li moved to Beijing where he works for China International Capital Corporation as head of the risk management department.〔
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