In this paper, we use the Markov chain censoring technique to study infinite state Markov chains whose transition matrices possess block-repeating entries. We demonstrate that a number of important probabilistic measures are invariant under censoring. Informally speaking, these measures involve...

En recourant de plus en plus aux modèles à forme réduite, la théorie de l'évaluation du risque de crédit se distance de plus en plus de l'ingénierie financière traditionnelle qui donne la part belle aux modèles structurels. Bien qu'ils postulent l'absence d'arbitrage, les modèles à...

In the context of simulating the transport of a chemical or bacterial contaminant through a moving sheet of water, we extend a well established method of approximating reaction-diffusion equations with Markov chains by allowing convection, certain Poisson measure driving sources and a larger...

Several long-range dependence, self-similar Gaussian processes arise from asymptotics of some classes of spatially distributed particle systems and superprocesses. The simplest examples are fractional Brownian motion and sub-fractional fractional Brownian motion, the latter being intermediate...

In this paper we present two new estimators which are robust in the presence of errors in variables. These estimators are much less erratic than their classic counterparts: The Durbin and Pal estimators. These new estimators are based upon sample moments of order greater than two. They may be...

Plusieurs gestionnaires de portefeuille pensent encore à tort qu’une couverture delta suffit pour protéger leur portefeuille contre les fluctuations des marchés financiers. Mais une augmentation marquée de la volatilité des cours boursiers les décevra dans leurs attentes. Après avoir...

Data suggest that the Canadian financial structure, and particularly indirect finance (e.g., banking), have become more market-oriented. we associate this financiel trend in part with the regulatory changes that have occured in Canada since the 1980s. Financial intermediaries are increasingly...

We examine various conditions under which a weighted weak law of large numbers holds, in the context of noncommutative probability theory.

Plusieurs études antécédentes montrent que depuis les années 80, la proportion des revenus bancaires provenant d’activités hors bilan n’a cessé d’augmenter. Ces études indiquent aussi que les revenus hors bilan sont beaucoup plus volatils que les revenus nets d’intérêts, et...

In this paper, we investigate several sample path properties on the increments of (N,d)-Gaussian random fields and also we obtain the law of iterated logarithm for the Gaussian random field, via estimating upper and lower bounds of large deviation probabilities on suprema of the (N,d)- Gaussian...