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...

The evolution in Information Communication Technologies, the changes in the labour market requirements together with the needs and expectation of students who arrive in higher education institutions, are forcing education to adapt. Students do not learn all at the same pace nor have all the same...

Traditional credit risk models adopt the linear correlation as a measure of dependence and assume that credit losses are normally-distributed. However some studies have shown that credit losses are seldom normal and the linear correlation does not give accurate assessment for asymmetric data....