Banks could achieve substantial improvements of their portfolio credit risk assessment by estimating rating transition matrices within a time-continuous Markov model, thereby using continuous-time rating transitions provided by internal rating systems instead of discrete-time rating information....

Investitionen bilden einen wesentlichen Bestandteil für das wirtschaftliche Wachstum einer Volkswirtschaft. Detaillierte Untersuchungen zu Strukturänderungen der Investitionstätigkeit von Wirtschaftszweigen liefern daher wesentliche Einblicke in wirtschaftliche Entwicklungstendenzen und...

With the coefficient matrices of the polynomial matrices replacing the scalar coefficients in the standard Sylvester matrix, common factors exist if and only if this (generalized) Sylvester matrix is singular and the coefficient matrices commute. If the coefficient matrices do not commute, a...