The productivity of the most attractive terms of applications in various fields, particularly management. In this regard, human resources productivity plays a key role in any organization.  This study aimed to investigate the relationship between work ethics and productivity of human resources management, time management .Time do research hypotheses using questionnaire distributed among m...

Chiu and Yin (2005) found the Laplace transform of the last time a spectrally negative Lévy process, which drifts to∞, is below some level. The main motivation for the study of this random time stems from risk theory: what is the last time the risk process, modeled by a spectrally negative Lévy process drifting to ∞, is 0? In this paper we extend the result of Chiu and Yin, and we derive the La...

We show that results from the theory of random matrices are potentially of great interest to understand the statistical structure of the empirical correlation matrices appearing in the study of multivariate financial time series. We find a remarkable agreement between the theoretical prediction (based on the assumption that the correlation matrix is random) and empirical data concerning the den...