In general, the properties of the conditional distribution of multiple period returns do not follow easily from the one-period data generating process. This renders computation of Value-at-Risk and Expected Shortfall for multiple period returns a non-trivial task. In this paper we consider some...

In this note it is argued that the estimation error in Value-at-Risk predictors gives rise to underestimation of portfolio risk. We propose a simple correction and find in an empirical illustration that it is economically relevant.

In the estimation of risk measures such as Value at Risk and Expected shortfall relatively short estimation windows are typically used rendering the estimation error a possibly non-negligible component. In this paper we build upon previous results for the Value at Risk and discuss how the...

A pour but d'exposer les principaux concepts permettant de décrire et de comprendre le comportement des consommateurs afin de prendre les meilleures décisions marketing. Analyse des décisions concrètes prises par les services marketing pour montrer la façon dont elles répondent aux...

By means of qualitative studies of ethnic consumers with Moroccan, Tahitian, Turkish and Congolese backgrounds, this article demonstrates that ethnic consumers in France are experiencing reculturation through consumption, using products, brands and points of sale to negotiate this re-discovery...

A partir de différentes disciplines, ces études expliquent la construction culturelle, politique ou idéologique des identités.

Illustré de cas d'étude, ce document expose les principaux concepts permettant de décrire et comprendre le comportement des consommateurs, afin de prendre les meilleures décisions marketing.

This article focuses on a research field little covered in the marketing literature: the influence of the ageing process on the over 60 years old consumer behavior. Mostly studied through proxy variables such as chronological age and retirement, the developmental psychology stream is also useful...