1. How rating agencies achieve rating stability;Altman;Journal of Banking and Finance,2004
2. Further evidence on the great crash, the oil-price shock, and the unit-root hypothesis;Andrews;Journal of Business and Economic Statistics,1992
3. Determinants and impact of sovereign credit ratings;Cantor;Federal Reserve Bank of New York Economic Policy Review,1996
4. Practical Nonparametric Statistics;Conover,1999
5. The procyclical role of rating agencies: Evidence from the east Asian crisis;Ferri;Economic Notes,1999