In this paper, we extend the promotion cure rate model studied in Yakovlev and Tsodikov (1996) and Chen et al. (1999) by incorporating an excess of zeros in the modeling. Despite relating covariates to the cure fraction, the current approach does not enable us to relate covariates to the...

This article presents a semi-Markov process based approach to optimally select a portfolio consisting of credit risky bonds. The criteria to optimize the credit portfolio is based on l∞-norm risk measure and the proposed optimization model is formulated as a linear programming problem. The...

The Securities and Exchange Commission (SEC) has asked whether credit rating agencies (CRA) committed fraud by misleading investors with respect to the default risk on mortgage backed securities (MBS). This paper argues that, to the detriment of investors, the CRA did not incorporate information...