Estimating credit scores with Logit -- The structural approach to default prediction and valuation -- Transition matrices -- Prediction of default and transition rates -- Modeling and estimating default correlations with the asset value approach -- Measuring credit portfolio risk with the asset value approach -- Validation of rating systems -- Validation of credit portfolio models -- Risk-neutral default probabilities and credit default swaps -- Risk analysis of structured credit : CDOs and first-to-default swaps -- Basel II and internal ratings.