no code implementations • 24 Aug 2023 • Philipp Otto, Osman Doğan, Süleyman Taşpınar, Wolfgang Schmid, Anil K. Bera
In this paper, we aim to provide a comprehensive review of the recent literature on spatial and spatiotemporal volatility models.
no code implementations • 10 May 2020 • Taras Bodnar, Solomiia Dmytriv, Yarema Okhrin, Nestor Parolya, Wolfgang Schmid
In this paper, using the shrinkage-based approach for portfolio weights and modern results from random matrix theory we construct an effective procedure for testing the efficiency of the expected utility (EU) portfolio and discuss the asymptotic behavior of the proposed test statistic under the high-dimensional asymptotic regime, namely when the number of assets $p$ increases at the same rate as the sample size $n$ such that their ratio $p/n$ approaches a positive constant $c\in(0, 1)$ as $n\to\infty$.
no code implementations • 9 Jul 2018 • Patrick Rodler, Wolfgang Schmid
As initial system observations usually do not suffice to deterministically pin down just one explanation of the system's misbehavior, additional system measurements can help to differentiate between possible explanations.
no code implementations • 9 Mar 2018 • David Bauder, Taras Bodnar, Nestor Parolya, Wolfgang Schmid
The parameters of the posterior predictive distributions are functions of the observed data values and, consequently, the solution of the optimization problem is expressed in terms of data only and does not depend on unknown quantities.
Statistical Finance Portfolio Management
no code implementations • 15 Nov 2017 • Patrick Rodler, Wolfgang Schmid, Konstantin Schekotihin
To this end, Sequential Diagnosis approaches ask an oracle for additional system measurements.
no code implementations • 28 May 2017 • Patrick Rodler, Wolfgang Schmid, Konstantin Schekotihin
In this work we present strategies for (optimal) measurement selection in model-based sequential diagnosis.
no code implementations • 14 Dec 2016 • Patrick Rodler, Wolfgang Schmid, Kostyantyn Shchekotykhin
During query computation, existing sequential diagnosis methods often require the generation of many unnecessary query candidates and strongly rely on expensive logical reasoners.