We apply the Malliavin calculus to study several non-degeneracy conditions on the coefficients of a stochastic differential equation on the plane, in order to deduce the existence and smoothness of density for the law of the solution.

In this paper we study the relation between different quadratic variations associated with a two-parameter continuous martingale in terms of the "absolute continuity" property. We give an application to the problem of defining a suitable local time for this kind of processes.

We consider copulas with a given diagonal section and compute the explicit density of the unique optimal copula which maximizes the entropy. In this sense, this copula is the least informative among the copulas with a given diagonal section. We give an explicit criterion on the diagonal section...

In-memory technology will radically transform the world of enterprise information systems Ðaccording to our enterprising quartet of Tim, Stephan, Martin, and Christian. Their article provides a comprehensive description of the elements of in-memory technology and the ways it might improve the...

This article documents the business cycle characteristics of the Chinese economy by adopting both nonparametric and parametric methodologies. The two approaches are applied to relevant macroeconomics indicators -- Gross Domestic Product (GDP) and Industrial Production (IP) indices -- aiming to...

This paper examines whether or not a discrete-time econometric test for nonlinearity in mean may be used in cases where the data are believed to be generated in continuous time. It is demonstrated that appropriate bootstrapping techniques are required to yield a test statistic with sensible...