L’objet de cette étude est d’évaluer l’impact des décisions des agences de notation (modifications de notation de crédit et les mises sous surveillance de ces notations) sur le prix des actions. Nous concentrons notre étude sur le marché français et comparons nos résultats aux...

The aim of this thesis is to analyze, from an empirical point of view, both the different varieties of economic and financial crises (typological analysis) and the context’s characteristics, which could be associated with a likely occurrence of such events. Consequently, we analyze both: years...

In this paper we discuss consistency of the posterior distribution in cases where the Kullback-Leibler condition is not verified. This condition is stated as : for all $\epsilon 0$ the prior probability of sets in the form $\{f ; KL(f0 , f ) \leq \epsilon\}$ where KL(f0 , f ) denotes the...

We examine the unconditional distribution of the realized variance of three European stock market indexes obtained from intraday transaction prices. We find that they share common distributional features: a significant mass close to zero, a sharp decrease afterwards and a significant right tail....

This article explores the influence of social background and social situation on the smoking career. This study is based on a sample of 4.473 individuals who answered the 2006 French Health, Health Care and Insurance Survey. The results of a non-parametric analysis and of a stratified Cox model...

This work aims to study the relationship between the entry to export market and industrial firm productivity in the Tunisian context. At the outset, we analyze Tunisian regulation and fiscal policy system of industrial firms and we focus on Tunisian trade policy during the last decades. In the...

We derive rates of contraction of posterior distributions on non-parametric models resulting from sieve priors. The aim of the study was to provide general conditions to get posterior rates when the parameter space has a general structure, and rate adaptation when the parameter is, for example,...

This article evaluates the impact of the 2006 compliance event on changes in investors' risk aversion on the European Carbon Market using the newly available option prices dataset. Thus, we aim at capturing the specific event that occurred on April 2007 as the European Commission disclosed the...

A stationary Gaussian process is said to be long-range dependent (resp., anti-persistent) if its spectral density f(λ) can be written as f(λ)=|λ|−2dg(|λ|), where 0d1/2 (resp., −1/2d0), and g is continuous and positive. We propose a novel Bayesian nonparametric approach for the estimation...