1Roy C. Smith and Ingo Walter. 2001, Rating Agencies: Is There an Agency Issue?[W].Stern School of Business, New York University. February 18:1-52.
2W. Braddock Hickman, 1958, Corporate Bond Quality and Investor Experience. 1st ed. Princeton University Press. 10-11.
3West, R.R. 1973.“Bond Ratings, Bond yields and financial regulation: some findings.”Journal of Law and Economics 16(April): 159-168.
4Earl D. Benson, David S, Kidwell,Timothy W. Koch and Robert J. Rogowski. 1981. Systematic Variation in Yield Spreads for Tax-Exempt General Obligation Bonds. Journal of Financial and Quantitative Analysis. Vol.16. No.5:685-702
5Nandkumar Nayar and Michael S. Rozeff. 1994. "Ratings, Commercial Paper, and Equity Returns." [J] the Journal of Finance. Vol. 49, No. 4. pp1431-1449.
6Stiglitz, Joseph E. 1975, "The Theory of 'Screening' , Education, and the Distribution of Income. " American Economic Review 65(June): 283-300.
7Akerlof, George A. 1970,“The Market for 'Lemons' : Qualitative Uncertainty and the Market Mechanism.”Quarterly Journal of Economics 84 (August): 488-500.
8Hurley, Eelyn M., 1982. the commercial paper market since the midseventies, Federal Researve Bulletin, June. 327-340.