Determining whether a data set contains one or more outliers is a challenge commonly faced in applied statistics. This paper introduces a distribution-free test for multiple outliers in data drawn from an unknown data generating process. Besides, a sequential algorithm is proposed in order to...

This paper considers factor estimation from heterogenous data, where some of the variables are noisy and only weakly informative for the factors. To identify the irrelevant variables, we search for zero rows in the loadings matrix of the factor model. To sharply separate these irrelevant...

Recent releases of X-13ARIMA-SEATS and JDemetra+ enable their users to choose between the non-parametric X-11 and the parametric ARIMA model-based approach to seasonal adjustment for any given time series without the necessity of switching between different software packages. To ease the...

Der folgende Beitrag analysiert das optimale Verhalten eines Investors, der Arbitrage zwischen Kassa- und Futuresmarkt betreibt. Gegenüber dem Standardmodell der cash & carry-Arbitrage wird der zulässige Strategieraum des Arbitrageurs erweitert, indem berücksichtigt wird, daß der Arbitrageur...