English, Article edition: A generalized ROC approach for the validation of credit rating systems and scorecards Stylianos Z. Xanthopoulos; Christos T. Nakas

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Bookmark: http://trove.nla.gov.au/version/30806
Physical Description
  • article
Language
  • English

Edition details

Title
  • A generalized ROC approach for the validation of credit rating systems and scorecards
Author
  • Stylianos Z. Xanthopoulos
  • Christos T. Nakas
Physical Description
  • article
Notes
  • Purpose – The purpose of this article is to introduce Receiver Operating Characteristic (ROC) surfaces and hyper-surfaces within a banking context as natural generalizations of the ROC curve. Design/​methodology/​approach – Nonparametric ROC analysis using U-statistics theory was used. Findings – Application of the proposed methodology on data from a small size Greek bank illustrates the usefulness of ROC analysis for scoring systems assessment. The area under the ROC curve and the volume under the ROC surface and hyper-surface are useful diagnostic indices for the assessment of credit rating systems and scorecards. The notion of statistical significance is not adequate for the evaluation of the loan granting strategy of a financial institution. Originality/​value – This article will be of value to financial institutions during the process of evaluation/​validation of rating models.
  • Banking, Classification, Credit rating, Financial institutions, Financial modelling
  • RePEc:eme:jrfpps:v:8:y:2007:i:5:p:481-488
Language
  • English
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