Cet article prend appui sur l'expérience de la libéralisation du marché gazier en Europe continentale pour interroger l'action en situation d'incertitude. Notre enquête auprès de fournisseurs et auprès des acheteurs industriels de gaz dévoile les activités intersubjectives de...

Purpose - The purpose of this paper is to add to our understanding of the monitoring role of multiple large shareholders by examining their impact on the informativeness of firms' earnings. Design/methodology/approach - We use regression models that relate earnings to stock returns for a sample...

The main purpose of this paper is to consider the multivariate GARCH (MGARCH) framework to model the volatility of a multivariate process exhibiting long term dependence in stock returns. More precisely, the long term dependence is examined in the …first conditional moment of US stock returns...

Abrupt changes in the unconditional variance of returns have been recently revealed in many empirical studies. In this paper, we show that traditional KPSS-based tests have a low power against nonstationarities stemming from changes in the unconditional variance. More precisely, we show that...