5Jorion P.Value at Risk:The new benchmark for measuring financial risk[M].New York:The McGraw-Hill Companies,Inc,1997:97-106.
6Penza P,Bansal V K.Measuring market risk with value at risk[M].New York:John Wiley &Sons,Inc,2001:28-56.
7Morgan J P.Risk metrics:technical document[M].New York:J P Morgan,Inc,1997:105-148.
8G. G. Walter,G. G. Hamedani. Bayes empirical Bayes estimation for discrete exponential families[J] 1989,Annals of the Institute of Statistical Mathematics(1):101～119
