3.1. Building a representative sample from the empirical data

3.2. Adjustment of ratings to the base scale

4.1. Credit ratings and PD models

4.2. Interpretation of financial factors of influence on credit risk of a bank

4.3. Principal component analysis

5.1. Calibration of rating scale and probability of default

5.2. Comparison of distributions of forecast errors of PD and ratings model

5.3. Construction of synergic models

5.3.1. Out-of-sample check of the synergic model