5Kealhofer S., Kurbat M.. Benchmarking quantita- tive default risk models:Avalidation methodology. Research paper.Moody' s KMV, 2000.
6Hand, Holthausen, Leftwich. The Effect of Bond Rating Agency Announcement on Bond and Stock Prices[J]. Journal of Finance, 1992,47:733-752.
7Kliger. The Information Value of Bond Rating [J].Journal of Finance,2000,6:2879-2902.
8Deliaiiedis G and Geske R. Credit Risk and Risk Neutral Default Probabilities: Information about Rating Migrations and Defaults[R]. Working Paper, UCLA,1999,12-30.
9White, Lawrence J. Markets: The Credit Rating Agencies[J]. Journal of Economics Perspectives, Spring2010, Vol. 24 Issue2,211-226.
10Ahman and Suggitt. Default Rates in the Syndi- cated Bank Loan Market: A Mortality Analysis[J].Jour- nal of Banking and Finance,2000,24:229-253.