An elementary arbitrage principle and the existence of trends in financial time series, which is based on a theorem published in 1995 by P. Cartier and Y. Perrin, lead to a new understanding of option pricing and dynamic hedging. Intricate problems related to violent behaviors of the underlying,...

Systematic and multifactor risk models are revisited via methods which were already successfully developed in signal processing and in automatic control. The results, which bypass the usual criticisms on those risk modeling, are illustrated by several successful computer experiments.

Causation between time series is a most important topic in econometrics, financial engineering, biological and psychological sciences, and many other fields. A new setting is introduced for examining this rather abstract concept. The corresponding calculations, which are much easier than those...

Systematic and multifactor risk models are revisited via methods which were already successfully developed in signal processing and in automatic control. The results, which bypass the usual criticisms on those risk modeling, are illustrated by several successful computer experiments.

An elementary arbitrage principle and the existence of trends in financial time series, which is based on a theorem published in 1995 by P. Cartier and Y. Perrin, lead to a new understanding of option pricing and dynamic hedging. Intricate problems related to violent behaviors of the underlying,...

Linear systems with a derivation of non-integer order are examined as a special case of systems described by Mikusiński operators. Controllability and observability are examined using the theory of modules, as well as regulation of finite-dimensional systems. A stability result is obtained...

De nombreuses recherches ont cherché à comprendre la dynamique de la socialisation ainsi qu'à en décrire les mécanismes. Toutefois, la construction de sens n'a été appréhendée que comme l'un des aspects de la socialisation, le plus souvent limité aux surprises et contrastes perçus...

Nous proposons ici un essai théorique, qui analyse le concept de socialisation organisationnelle sous l'angle du sensemaking. Nous montrons que les deux processus sous-jacents de la socialisation - apprentissage et intériorisation - peuvent être considérés comme des processus de...

Les études les plus récentes qui s'intéressent au commerce équitable montrent que ce système commercial connaît un processus de standardisation, dans lequel les producteurs du Sud sont de plus en plus contraints à respecter les exigences en termes de gouvernance et de responsabilité...