A Class of Discrete Transformation Survival Models With Application to Default Probability Prediction

• 成果类型: Article
• 署名作者: Ding, A. Adam; Tian, Shaonan; Yu, Yan; Guo, Hui
• 署名单位: Northeastern University; University System of Ohio; University of Cincinnati
• 刊物名称: JOURNAL OF THE AMERICAN STATISTICAL ASSOCIATION
• ISSN/ISSBN: 0162-1459
• DOI: 10.1080/01621459.2012.682806
• 发表日期: 2012
• 页码: 990-1003
• 关键词: maximum-likelihood-estimation; regression-models; efficient estimation

摘要

Corporate bankruptcy prediction plays a central role in academic finance research, business practice, and government regulation. Consequently, accurate default probability prediction is extremely important. We propose to apply a discrete transformation family of survival models to corporate default risk predictions. A class of Box-Cox transformations and logarithmic transformations is naturally adopted. The proposed transformation model family is shown to include the popular Shumway model and the grouped relative risk model. We show that a transformation parameter different from those two models is needed for default prediction using a bankruptcy dataset. In addition, we show using out-of-sample validation statistics that our model improves performance. We use the estimated default probability to examine a popular asset pricing question and determine whether default risk has carried a premium. Due to some distinct features of the bankruptcy application, the proposed class of discrete transformation survival models with time-varying covariates is different from the continuous survival models in the survival analysis literature. Their similarities and differences are discussed.