Judgmental Versus Quantitative Credit Risk Measures for Sovereigns
by Yen-Ting Hu of Birkbeck College, Rudiger Kiesel of the London School of Economics, William Perraudin of Birkbeck College & Bank of England & CEPR, and Gerhard Stahl of Bundesaufsichtsamt für Kreditwesen
May 2002
Abstract: This paper compares the informational content of judgmentally determined sovereign ratings produced by a private sector bank and by the rating agency Standard and Poor's, with ratings derived from econometric analysis of sovereign default. We show that downgrades in both the bank and the agency ratings may be predicted using quantitative ratings whereas upgrades in the quantitative ratings appear to be predictable using judgmental ratings.