TY - CHAP TI - A Dynamic Latent Variable Approach to Validate Credit Rating Systems AF - Computational Finance and Financial Engineering, Third R/Rmetrics User and Developer Workshop PP - Leissingen PY - 2009-07-01 AU - GrĂ¼n, Bettina AU - Hofmarcher, Paul AU - Hornik, Kurt AU - Leitner, Christoph AU - Pichler, Stefan ER -