The paper is concerned with the problem of image denoising for the case of grey-scale images. Such images consist of a finite number of regions with smooth boundaries and the image value is assumed piecewise constant within each region. New method of image denoising is proposed which is adaptive...

Modern econometrics requires implementation of highly specialized software. In contrast to mathematical arguments used in implementing new econometric techniques the corresponding software algorithms require specific platforms. The specialization of hardware and software, in fact, seriously...

We propose a new method of tail analysis for data featuring a high degree of leptokurtosis. Heavy tails can typically be found in financial series, like for example, the stock returns or durations between arrivals of trades. In our framework, the shape of tails can be assessed by fitting some...

Stochastic Volatility (SV) models are widely used in financial applications. To decide whether standard parametric restrictions are justified for a given dataset, a statistical test is required. In this paper, we develop such a test based on the linear state space representation. We provide a...

Dieser Beitrag informiert über die Bedeutung von Auktionen im Wirtschaftsleben, über Vor- und Nachteile gängiger Auktionsregeln sowie über grundlegende Konzepte und Ergebnisse der Theorie nichtkooperativer Auktionsspiele. Besonderes Gewicht hat die anschauliche Darstellung und kritische...

The most important policy instruments of the Bundesbank and of the coming European Central Bank involve lending to domestic credit institutions. In this monetary setup, banks use short-term central bank credits extensively in order to refinance long-term loans to the public, which makes them...

In this paper we characterize what has sometimes been referred to in the literature as instantaneous causality, by examining the consequences of temporal aggregation in (possibly) Granger causal systems of variables. Our approach is to compare the concept of contemporaneous correlation due to...

There is common consensus that managerial compensation is strongly tied to firm size and much less so to financial performance. One suspects that observed restructuring and downsizing in corporations in recent years may have an effect on these results. Based on multi-task theoretical...

Tests for the cointegrating rank of a vector autoregressive process are considered which allow for possible exogenous shifts in the mean of the data generation process. The break points are assumed to be known a priori. It is proposed to estimate and remove the deterministic terms such as mean,...

The integration of different learning and adaptation techniques in one architecture, to overcome individual limitations and achieve synergetic effects through hybridization or fusion of these techniques, has in recent years contributed to a large number of new intelligent system designs. Most of...