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Default Estimation and Expert Information: All Likely Dataset Analysis and Robust Validation

Nicholas Kiefer ()

Working Papers from Cornell University, Center for Analytic Economics

Abstract: Default is a rare event, even in segments in the midrange of a bank's portfolio. Inference about default rates is essential for risk management and for compliance with the requirements of Basel II. Most commercial loans are in the middle-risk categories and are to unrated companies. Expert information is crucial in inference about defaults. A Bayesian approach is proposed and illustrated using a prior distribution assessed from an industry expert. The method of All Likely Datasets, based on sufficient statistics and expert information, is used to characterize likely datasets for analysis. A check of robustness is illustrated with an epsilon-- mixture of priors.

Date: 2007-07
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Persistent link: https://EconPapers.repec.org/RePEc:ecl:corcae:07-11

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