As the biggest economy in Africa with one of the largest youth populations in the world, Nigeria is well-positioned to develop a strong digital economy. This would have a transformational impact on the country. In order to reap the benefits, Nigeria needs to focus on accelerating improvements in...

Three processes reflecting persistence of volatility are initially formulated by evaluating three Lévy processes at a time change given by the integral of a mean-reverting square root process. The model for the mean-reverting time change is then generalized to include non-Gaussian models that...

This paper examines seasoned equity offerings in France. Even though a rights offering is the primary flotation method, French companies are increasingly using the relatively expensive public offering method. We show that the market reaction to the announcement of seasoned equity issues is...

The fuzzy set approach has progressively been introduced into many areas of organisational science in order to compensate for certain inadequacies in traditional tools. Indeed behaviourists and expected utility researchers have long been studying the role of ambiguity and vagueness in the human...

En 2011, 48% des risk managers prennent leurs fonctions dans le cadre d’une création de poste. La proportion de directeurs du développement durable ayant pris leurs fonctions dans le cadre d’une création de poste l’année suivante est voisine. Ces chiffres sont la quantification d’un...