Development and validation of credit scoring models

Dennis Glennon, Nicholas M. Kiefer, C. Erik Larson and Hwan-sik Choi

Journal of Credit Risk

Abstract: ABSTRACT Accurate credit granting decisions are crucial to the efficiency of the decentralized capital allocation mechanisms in modern market economies. Credit bureaus, and many financial institutions, have developed and used credit scoring models to standardize and automate, to the extent possible, credit decisions. We build credit scoring models for bankcard markets using the Office of the Comptroller of the Currency, Risk Analysis Division (OCC/RAD) consumer credit database (CCDB). This unusually rich data set allows us to evaluate a number of methods in common practice.We introduce, estimate and validate our models, using both out-of-sample contemporaneous and future validation data sets. Model performance is compared using both separation and accuracy measures. A vendor-developed generic bureau-based score is also included in the model performance comparisons. Our results indicate that current industry practices, when carefully applied, can produce models

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