As a stock exchange dedicated to small and medium enterprises (SMEs), the success of the Alternative Investment Market (AIM) has established this segment of the London Stock Exchange as the benchmark, of which the Alternext is considered a flawed copy. This article aims to invalidate this...

Cet essai tente de démontrer que paradoxalement, même si les nouvelles technologies favorisent la circulation des idées et de l'information, les inégalités se creusent toujours plus. Le capitalisme continue de profiter à une minorité provoquant un appauvrissement des connaissances.

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...