Please click on the names to find out more about the members of the BIGSEM.

Prof. em. Volker Böhm, Ph.D.

Prof. Volker Böhm, obtained a Ph.D. in Economics from the University of California in Berkeley in 1972. Before joining the faculty of Bielefeld University in 1994, he taught at CORE, Université Catholique de Louvain, at Université Libre de Bruxelles, and at the University of Mannheim. Prof. Böhm has held visiting positions at various international universities and is associate editor of several scientific journals.

Research Interests: Economic Theory in the areas Microeconomics and Macroeconomics, in particular Stochastic Dynamic Economic Theory with applications mainly in Business Cycle Theory, Growth Theory, and Financial Market Theory

Prof. Böhm's Homepage


Prof. Dr. Christiane Clemens


Prof. Dr. Christiane Clemens held assistant and associate professor positions at the Universities of Hannover, Magdeburg and Hamburg and served as visiting professor at the Swiss Federal Institute of Technology, Zurich (ETH) and visiting associate professor at the University of Washington, Seattle. She was appointed to the Chair of Quantitative Macroeconomics at Bielefeld University effective from April, 2010.

Research Interests: Growth theory, income and wealth distribution, public economics, international economics, political economics, economics of uncertainty and learning

Prof. Clemens' Homepage


Prof. Dr. Herbert Dawid (BiGSEM chairman)

Prof. Dr. Herbert Dawid obtained his doctoral degree at the Vienna University of Technology. He held assistant and associate professor positions at the University of Vienna and was an associate professor at the University of Southern California in Los Angeles before coming to Bielefeld in 2003. Prof. Dawid has published numerous articles in internationally renowned scientific journals, has obtained several research awards and is currently editor of the Journal of Economic Dynamics and Control and on the editorial board of several other international journals.

Research Interests: Dynamic Industrial Organization, Evolutionary Economics, Agent-based Computational Economics

Prof. Dawid's Homepage


Prof. Dr. Bernhard Eckwert

After completing his doctoral studies in 1984, Prof. Dr. Bernhard Eckwert was part of the economics faculty of the University of Augsburg for several years. From 1993 until he joined Bielefeld University in 2002, he held a position as professor at the Technical University of Chemnitz. Prof. Eckwert is a frequent visitor to various international universities and research institutes. In recent years, his research activities have focused on the economics of information, risk sharing, and growth.

Research Interests: Economics of Information, Financial Economics, Endogenous Growth

Prof. Eckwert's Homepage


Prof. Dr. Giorgio Ferrari

Prof. Dr. Ferrari obtained a Ph.D. in Mathematics for Economic-Financial Applications at the University of Rome "La Sapienza" in 2012. He then moved to the Center for Mathematical Economics at Bielefeld University where he was Post-doctoral researcher (2012-2016), and then Junior-Professor (2016-2017). Since December 2017 he is Professor for Mathematical Finance. Prof. Dr. Giorgio Ferrari published research paper is renowed journal in Control, Applied Probability, and Operations Research.

Research Interests: stochastic control, optimal stopping, stochastic games, mathematical finance, mathematical economics

Prof. Ferrari's Homepage


Prof. Dr. Alfred Greiner

In 1993, Prof. Dr. Alfred Greiner successfully completed his doctoral studies with a dissertation on a topic in innovation economics. For several years, he was a faculty member of the University of Augsburg and visiting research fellow at the New School for Social Research, New York. Since 2000, Prof. Greiner has held a position as professor for economic policy at Bielefeld University. He is a member of the International Institute of Public Finance.

Research Interests: Public Finance, Macroeconomics, Optimal Control, Economic Dynamics, Optimal Growth

Prof. Greiner's Homepage


J-Prof. Dr. Tim Hellmann



Academic curriculum vitae

  • 2002 Pre-Diploma in Mathematics and Economics (BA), Bielefeld University
  • 2004 Master of Arts in Economics, University of Georgia, Athens (USA)
  • 2007 Diploma in Mathematics and Economics (MA), Bielefeld University
  • 2010 PhD in Economics (Dr.rer.pol.), Bielefeld University
  • since 2010 Assistant Professor (J.-Prof.), Bielefeld University

Research Interests: Game Theory, Network Formation, Evolution and Learning in Games

J-Prof Hellmann's Homepage


Dr. Sander van der Hoog

Research Interests: Economics, Evolutionary and Dynamic Game Theory, Nonlinear Economic Dynamics 

Prof. Dr. Frank Riedel

Prof. Riedel obtained a Ph.D. at Humboldt University in 1998. The doctoral thesis won the Humboldt prize. Afterwards, he was Assistant Professor at Humboldt University until 2002, when he went to UC Berkeley as a Postdoc. He then was Feodor-Lynen-Fellow at Stanford University before becoming Professor at Bonn University. He joined the Center for  Mathematical Economics in 2007. His coauthors include Mathematicians, Biologists, and Linguists. Prof. Riedel has published articles in renowned journals in Economics, Mathematics, and Biology.

Research Interests: Mathematical Finance, General Equilibrium Theory, Evolutionary Game Theory, Applications in Biology and Linguistics

Prof. Riedel's Homepage

Prof. em. Dr. Joachim Rosenmüller

Prof. Dr. Joachim Rosenmüller has been a member of the Center for Mathematical Economics since 1978. He was the institute's director from 1984 to 2002. Before being appointed full professor at the University of Karlsruhe in 1972, Prof. Rosenmüller was assistant professor at the University of Aarhus, the University of Minnesota, and the University of British Columbia. He is associate editor of numerous international scientific journals and author of several books on game theory.

Research Interests: Game Theory, Decision Theory, General Equilibrium, Bargaining, Stochastic Optimization, Stochastic Dynamic Programming, Algorithms and Recursive Procedures, Implementation, Non-additive Set Functions, Probability and Uncertainty, Formel Epistemology in the Economic Context

Prof. Rosenmüllers's Homepage


J-Prof. Dr. Jan-Henrik Steg

 Academic curriculum vitae

  • 2005 Diploma in Business Engineering and Economics, Karlsruhe Institute of Technology, following studies in Karlsruhe and Lausanne, CH
  • 2010 PhD in Economics, Bielefeld University, following PhD studies in Bielefeld and at University of Paris 1)
  • 2010 Postdoctoral Researcher, Center for Mathematical Economics, Bielefeld University
  • 2011 Assistant Professor, Center for Mathematical Economics, Bielefeld University

Research Interests: Dynamic Game Theory, Strategic Investment under Uncertainty, Stochastic Optimal Control



Prof. em. Dr. Walter Trockel


Prof. Dr. Walter Trockel earned his doctoral degree at the University of Bonn. After stays as visiting scholar in Berkeley in 1973/74 and in spring 1981 he moved to Bielefeld University in 1984 where he held the former chair of Reinhard Selten at the Center for Mathematical Economics (IMW) from 1985 till 2012. He had acted as the director of the IMW from 2002 to 2009.Trockel is managing editor of the Springer Lecture Notes in Economics and Mathematical Systems and is and has been associate editor of several international journals. He is a scientific member of the International Advisory Board of the School of Business and Economics of Maastricht University, member of the Board of the Society of Economic Design and of Shandong University´s Research Center of Games and Economic Behavior (RCGEB). Istanbul Bilgi University Trockel, who has published numerous articles in renowned journals of Economics and Mathematics, is an Economic Theory Fellow ,a Fellow of the Murat Sertel Center for Advanced Economic Studies and acts presently as a part time Full Professor at Istanbul Bilgi University.

Research Interests: Mechanism Design, Game Theory, General Equilibrium Theory, Decision Theory, Social Choice and Welfare

Prof. Trockel's Homepage


J-Prof. Dr. Hale Utar

J-Prof. Dr. Utar obtained her PhD in economics from Pennsylvania State University (Penn State) in 2006.  Before coming to the University of Bielefeld, she worked as an Assistant Professor at the Department of Economics at University of Colorado, Boulder. Her fields of specialization are International Trade and Industrial Organization.

Research Interests: Microeconomic Impacts of Globalization, International Competition, Trade Impact on Firms and Labor, Trade and Innovation, Market Openness, Technology and Knowledge Transfer between Firms in the Global Markets, Productivity

J-Prof. Dr. Utar’s homepage


Prof. Dr. Gerald Willmann

Gerald Willmann obtained a PhD in economics from Stanford University in 2000.  Before coming to the University of Bielefeld, he was junior faculty at the University of Kiel and associate professor at the Katholieke Universiteit Leuven.

Research Interests: International Trade, Political Economy, and Economic Integration.

Prof. Willmanns's Homepage


J-Prof. Dr. Anna Zaharieva

Dr. Anna Zaharieva obtained her doctorate in Quantitative Economics at the University of Konstanz in the year 2010. Earlier in 2008 she had completed her doctoral studies in Mathematical Finance at the Russian Plekhanov Academy of Economics. In the year 2010 she was appointed as a postdoctoral fellow at the University of Bielefeld.

Research Interests: labour economics, search theory, labour econometrics, contract theory





Please click on the names to find out more about the members of the BIGSEM.

Prof. Dr. Matthias Amen

Prof. Dr. Matthias Amen worked in industry before starting his academic carrier. He was member of universities in Paderborn, Passau, Berne (Switzerland), Duisburg-Essen and Eichstätt-Ingolstadt. He obtained his doctoral degree at the University of Passau with a dissertation on combinatorial optimization in cost-oriented assembly line balancing. For several years he worked parallel at university and at the transaction advisory services of one of the big international auditing companies where he specialized in restructuring and valuation. He attained the habilitation at University of Duisburg-Essen with a thesis on simulation analysis of international accounting for pensions. Since 2008 he is professor for quantitative accounting and financial reporting at Bielefeld University.

Research Interests: Complex topics in Financial Reporting, Valuation & Business Analysis, Quantitative Methods in Managerial & Financial Accounting, Planning & Operations Management

Prof. Dr. Thomas Braun

Prof. Dr. Thomas Braun acquired a deep knowledge in economics and business administration by majoring in both subjects. He was a member of the Universities of Mainz, Bonn, Frankfurt, and Passau and completed his dissertation on risk management with options and futures at the University of Passau in 1989. In 1997, Prof. Braun was appointed professor at Bielefeld University. His teaching focuses mainly on lectures and seminars in finance.

Research Interests: Asset Management, Risk Management, Information-Economic Aspects of Financing Decisions, Capital Market Theory, Real Options.

Prof. Dr. Reinhold Decker

Prof. Dr. Reinhold Decker majored in industrial engineering with specializations in operations research and computer science. He completed his doctoral studies with a thesis on the "Analysis and simulation of buying behavior in consumer goods markets" at the University of Karlsruhe in 1993. Prof. Decker was a faculty member in Karlsruhe and visiting professor at the University of Vienna before joining the Department of Economics and Business Administration in 1997. He is actively involved in several research and technology transfer activities at Bielefeld University.

Research Interests: Modelling of Purchases and Consumer Behaviour, Quantitative Methods of Marketing Research, Computer-Based Support of Decision-Making in Marketing, Market Research and Retail Trade, Neural Networks in Market Research, Competition Analysis by Means of Rank-Coded Data, Data Mining in Marketing


Prof. Dr. Hermann Jahnke

Prior to joining the Business Administration and Economics Department at Bielefeld University in 1995, Hermann Jahnke was visiting professor at the University of the German Federal Armed Forces in Hamburg and professor for Business Administration at Cologne University. He completed his Habilitation in Operations Management at the Institute for Logistics & Transport and his PhD at the Institute for Statistics and Econometrics, both at Hamburg University. He has published a number of articles in international journals including Decision Sciences, the European Journal of Operational Research, Computers & OR, the International Journal of Production Economics, and the Journal of Mathematical Modelling and Algorithms.

Research Interests: Managerial information and accounting instruments; decision theory; management of industrial services; supply chain management; Lotsizing and Scheduling Problems.

Prof. Dr. Rolf König

Prof. Dr. Rolf König majored in mathematics and computer science and completed his doctoral studies in 1989 at the University of Bonn. He was a faculty member at the University of Augsburg and appointed professor at Bielefeld University in 1995. Prof. König is the author of numerous articles and several books.

Research Interests: Capital Market Theory, Taxation of Companies, Tax and Capital Market Values of Companies, Taxation of Gains from Shares, Taxes and Investments

Prof. Dr. Christian Stummer

Prof. Dr. Christian Stummer received his doctoral degree from the University of Vienna where he held the position of an associate professor before joining Bielefeld University in 2010. He also served as the head of a research group at the Electronic Commerce Competence Center in Vienna and made professional experiences as a visiting professor at the University of Texas at San Antonio. His research has been widely published in various internationally renowned scientific journals mostly from the fields of Business Administration, Information Technology, and/or Operations Research.

Research Interests: Innovation and Technology Management, Multiobjective Portfolio Analysis, Interactive Decision Support, Agent-based Simulation of Diffusion Processes.

Prof. Stummer's Homepage




Quantitative Methods

Please click on the names to find out more about the members of the BIGSEM.

Prof. Dr. Dietmar Bauer

Prof. Dr. Dietmar Bauer obtained his PhD in Applied Mathematics from the TU Wien, Austria, in 1998. After several postdoc positions (including Newcastle University, Australia, Linköping, Sweden, and Yale, USA) he returned to the TU Wien and received the Habilitation in econometrics. In 2005 he joined the Austrian Institute of Technology to work as a statistician in transportation science. Since 2014 he holds the chair in econometrics at Bielefeld university.

Research Interests: Time series econometrics; Discrete choice modeling; transportation science.

Prof.em. Dr. Joachim Frohn

Prof. Dr. Joachim Frohn was professor of Econometrics at FU Berlin; he joined the faculty in Bielefeld as professor of Statistics and Econometrics in 1974. Prof. Frohn was President of the German Statistical Society and Dean and President of the China-Europe-International-Business-School (CEIBS) in Shanghai. He is a member of the European Academy of Sciences and Arts.

Research Interests: Applied and Theoretical Econometrics, Disaggregated Econometric Models, Empirical Economic Research, Microeconometrics

Prof. Frohn's Homepage

Prof. Dr. Roland Langrock

After completing his doctoral degree in Economics at the University of Göttingen in 2011, Prof. Dr. Roland Langrock was a member of the School of Mathematics and Statistics at the University of St Andrews, initially as a postdoc and from 2013 as a lecturer. Since 2015, he is a full professor of statistics and data analysis at Bielefeld University. In 2016, he received the Karl-Peter-Grotemeyer prize for outstanding achievements and personal engagement in teaching. In his research, Prof. Langrock focuses on statistical method development as well as applications primarily in ecology and in economics. He has published in leading statistics journals such as the Journal of the American Statistical Association, Biometrics, and Statistics in Medicine.

Research Interests: hidden Markov models, nonparametric methods, model selection, statistical ecology, financial time series, sports analytics



BiGSEM Workshop

The 13th BiGSEM Doctoral Workshop on Economic Theory took place at Bielefeld University earlier this week. The annual event is entirely organized by doctoral students for doctoral students. Out of a pool of applications, sixteen speakers where invited to talk about their research in various fields of theoretical economics. All of these talks took place in the plenary hall of the Center for Interdisciplinary Research amidst the green of the Teutoburg Forest. Afterwards, everybody returned home with new ideas and concepts. Pictures

Serhat Gezer

Serhat Gezer successfully defended his thesis on "Dynamic and Strategic Analysis of Innovations"



BiGSEM student Serhat Gezer will defend his doctoral thesis. It will take place in U3-140 at 2 pm on Friday November 23.

New visiting PhD student

Elena Iakimova from University of Calabria (IT) is taking part in BiGSEM as a visiting student in the time from 01/10/2018 to 28/02/2019. Her research interests are mainly focused on energy resources.


BiGSEM happily welcomes ExSIDE students

BiGSEM happily welcomes three second year ExSIDE doctoral students who are now doing their research in BiGSEM during the academic year 2018/19:

Ms. Fen Li
Mr. Thanh Son Pham
Mr. Severin Reissl

We wish our new students a good start and much success with their academic program!