[AG Guhr] [Uni Duisburg-Essen]


Die Nachwuchsgruppe "Wirtschaftsphysik" unter Leitung von Dr. Rudi Schäfer beschäftigt sich mit der statistischen Analyse und Modellierung von Finanz- und Wirtschaftsdaten.


Unsere aktuellen Forschungsschwerpunkte sind:


PD Dr. Rudi Schäfer


Raum:    MG 331
Telefon:    + 49 (0)203 379 4734

Desislava Chetalova


Raum:    MG 332
Telefon:    + 49 (0)203 379 4735

Thilo Schmitt


Raum:    MG 323
Telefon:    + 49 (0)203 379 4729

Yuriy Stepanov


Raum:    MG 333
Telefon:    + 49 (0)203 379 4733

Shanshan Wang


Raum:    MG 333
Telefon:    + 49 (0)203 379 4733

Frederik Meudt

Master Student

Raum:    MG 362
Telefon:    + 49 (0)203 379 4737

Peter Raiser

Master Student

Raum:    MG 331
Telefon:    + 49 (0)203 379 4734

Joachim Sicking

Master Student

Raum:    MG 330
Telefon:    + 49 (0)203 379 4727

Daniel Wagner

Master Student

Raum:    MG 362
Telefon:    + 49 (0)203 379 4737

Marcel Wollschläger

Bachelor, 2013

Raum:    MG 331
Telefon:    + 49 (0)203 379 4734

Ehemalige Mitarbeiter

Alexander Becker

Diplomarbeit, 2011 - 2012

Boston University

Lukas Gathmann

Master-Arbeit, 2012 - 2013


Stefan Hindel

Diplomarbeit, 2010 - 2011


Alexander Koivusalo

Master-Arbeit, 2008 - 2009

Danske Capital, Copenhagen

Evguenia Lioudko

Projektarbeit, 2008


Dr. Michael C. Münnix

Doktorarbeit, 2008 - 2011

Target Partners GmbH, München

Dr. Sachiko Oshima

Postdoc, 2012-2013



D. Chetalova, R. Schäfer and T. Guhr
Zooming into market states
preprint: arXiv:1406.5386
M.C. Münnix, R. Schäfer and T. Guhr
A Random Matrix Approach to Credit Risk
PLOS ONE, 9, e98030 (2014) ,    preprint: arXiv:1102.3900
D.C. Wagner, T.A. Schmitt, R. Schäfer, T. Guhr, D.E. Wolf
Analysis of a decision model in the context of equilibrium pricing and order book pricing
preprint: arXiv:1404.7356
M.C. Münnix, R. Schäfer and O. Grothe
Estimating correlation and covariance matrices by weighting of market similarity
Quantitative Finance, 14, 931-939 (2014) ,    preprint: arXiv:1006.5847
T.A. Schmitt, D. Chetalova, R. Schäfer and T. Guhr
Credit risk and the instability of the financial system: An ensemble approach
Europhysics Letters 105, 38004 (2014) ,    preprint: arXiv:1309.5245
T.A. Schmitt, D. Chetalova, R. Schäfer and T. Guhr
Non-Stationarity in Financial Time Series and Generic Features
Europhysics Letters 103, 58003 (2013) ,    preprint: arXiv:1304.5130
Vinayak, R. Schäfer and T.H. Seligman
Emerging spectra of singular correlation matrices under small power-map deformations
Phys. Rev. E 88, 032115 (2013) ,    preprint: arXiv:1304.4982
T.A. Schmitt, R. Schäfer, D. Wied and T. Guhr
Spatial Dependence in Stock Returns - Local Normalization and VAR Forecasts
SFB 823 Discussion Paper 18/13 (2013).    Preprint available at: SSRN.com/abstract=2320675
D. Chetalova, T.A. Schmitt, R. Schäfer and T. Guhr
Portfolio return distributions: Sample statistics with non-stationary correlations
preprint: arXiv:1308.3961
A.F.R. Koivusalo and R. Schäfer
Calibration of structural and reduced-form recovery models
Journal of Credit Risk 8(4), 31-51 (2012) ,    preprint: arXiv:1102.4864
T.A. Schmitt, R. Schäfer, M.C. Münnix and T. Guhr
Microscopic understanding of heavy-tailed return distributions in an agent-based model
Europhysics Letters 100, 38005 (2012) ,    preprint: arXiv:1207.2946
R. Schäfer and A.F.R. Koivusalo
Dependence of defaults and recoveries in structural credit risk models
Economic Modelling 30, 1-9 (2013) ,    preprint: arXiv:1102.3150
M.C. Münnix, T. Shimada, R. Schäfer, F. Leyvraz, T.H. Seligman, T. Guhr and H.E. Stanley
Identifying States of a Financial Market
Scientific Reports 2 : 644 (2012) ,    preprint: arXiv:1202.1623
R. Schäfer, A.F.R. Koivusalo and T. Guhr
Credit Portfolio Risk and Diversification
invited contribution in:
Credit Securities and Derivatives - Challenges for the Global Markets
D. Rösch and H. Scheule (Eds.)
John Wiley & Sons, New York (April, 2013)
ISBN: 978-1119963967
A. Becker, A.F.R. Koivusalo and R. Schäfer
Empirical Evidence for the Structural Recovery Model
preprint on DefaultRisk.com
M.C. Münnix and R. Schäfer
A Copula Approach on the Dynamics of Statistical Dependencies in the US Stock Market
Physica A 390, 4251 (2011) ,    preprint: arXiv:1102.1099
M.C. Münnix, R. Schäfer and T. Guhr
Statistical causes for the Epps effect in microstructure noise
International Journal of Theoretical and Applied Finance 14, 1231-1246 (2011)
preprint: arXiv:1009.6157
M.C. Münnix, R. Schäfer and T. Guhr
Impact of the tick-size on financial returns and correlations
Physica A 389, 4828 (2010) ,    preprint: arXiv:1001.5124
R. Schäfer and T. Guhr
Local normalization: Uncovering correlations in non-stationary financial time series
Physica A 389, 3856 (2010)
M.C. Münnix, R. Schäfer and T. Guhr
Compensating asynchrony effects in the calculation of financial correlations
Physica A 389, 767 (2010) ,    preprint: arXiv:0910.2909
R. Schäfer, N. F. Nilsson and T. Guhr
Power mapping with dynamical adjustment for improved portfolio optimization
Quantitative Finance 10, 107 - 119 (2010)
R. Schäfer, M. Sjölin, A. Sundin, M. Wolanski and T. Guhr
Credit risk - A structural model with jumps and correlations
Physica A 383, 533 (2007) ,    preprint: arXiv:0707.3478