The aim of this paper is to identify which model, between the two classes of conditionalvariance models, GARCH and SV, provide the best goodness of fit in order to describestylized facts of financial time series returns. Our strategy consists in choosing threedifferent formulations for each...

The study of avalanche events is particularly important to assess and predict the degree of risk involved in a given area and time. In this work we consider an alternative methodology based on a space-time point process where the intensity function indicates the limiting expected rate of...

A wavelet-based spectral method for estimating the (directional) Hurst parameter in isotropic and anisotropic non-stationary fractional Gaussian fields is proposed. The method can be applied to self-similar images and, in general, to d-dimensional data which scale. In the application part, the...

Purpose – The aim of this article is to analyze and compare the share economy and the constitutional economy approaches. The fact that numerous world-class multinationals have chosen to offer stock options to managers and bonus share incentives to employees denotes a realization that any...

In the mid 1980s there was a remarkable revival of interest in growth theory and once again this became a very active area of macroeconomic research. A relevant strand of this approach is characterized by the departure from the usual assumption of diminishing returns of capital or, more...