Skip Navigation
People
Solveig Ahorner

Solveig Ahorner

Entry: 2019

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Solveig Ahorner joined the Ruhr Graduate School in Economics in October 2019. She obtained her Bachelor's and Master's degree in Mathematics and Economics from TU Dortmund University. During her studies, she worked as a tutor for the Departement of Computer Science and the Faculty of Business and Economics at TU Dortmund University. She also worked as a student trainee at the research departement of Materna Innovation & Communications SE. In her Master's thesis, she modeled and analysed competition in the cryptocurrency market from both a game theoretical and a data scientific point of view. In October 2020 she joined the Chair of Microeconomics and International Economics at the University of Duisburg-Essen as a research assistent for Prof. Dr. Eugen Kovac.


Main fields of interest: Microeconomics, Game Theory, Industrial Organization, Data Science

loannis Arampatzidis

loannis Arampatzidis

Entry: 2019

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen 

 

Ioannis Arampatzidis joined the Ruhr Graduate School in Economics in October 2019. He obtained his Bachelor and Master degrees in Economics from University of Macedonia in Greece. During his Master studies he worked as a research and teaching assistant for Prof. Theodore Panagiotidis. In his Master’s thesis, he employed a rolling SVAR model and used an impulse response analysis to examine the relationship between oil and stock markets in a dynamic framework. His main focus is on Energy Economics.

Main fields of interest: Energy Economics, Applied Econometrics, Macroeconomics

Lukas Berend

Lukas Berend

Entry: 2020

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Tel. +49 201 8149-520

Lukas Berend joined the Ruhr Graduate School in Economics in October 2020. Previously, he obtained his Bachelors in Economics and Political Science from Leuphana University Lüneburg and his Masters in Quantitative Economics from CAU Kiel. During his studies, Lukas worked as teachings assistant in Macroeconomics at Leuphana University and as student research assistant for a project on socio-economic development during industrialization and later, for the policy-oriented Mercator Dialogue on Asylum and Migration at the Kiel Institute for the World Economy. In his master’s thesis, Lukas implemented political polls and macroeconomic indicators in Bayesian state space models to forecast German federal elections from 1998 to 2017.

Main fields of interest: Election forecasting, Economic & Political Uncertainty, Time Series Analysis, Nowcasting

Niklas Benner

Niklas Benner

Entry: 2019

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Niklas Benner joined the Ruhr Graduate School in Economics in October 2019. He obtained his Bachelor’s as well as his Master’s degree in Economics from the University of Giessen. During his studies he worked as a student research assistant for Prof. Peter Tillmann at the Chair of Monetary Economics in Giessen. In his master thesis he measured the disagreement in the speeches of eurozone’s central bankers via NLP-Tools and evaluated its impact of the ECB’s policy efficiency.

Main fields of interest: Monetary Economics, Natural Language Processing, Political Economy

Eyayaw Teka Beze

Eyayaw Teka Beze

Entry: 2019

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Eyayaw Teka Beze joined the Ruhr Graduate School in Economics in October 2019. He received a bachelor’s degree in economics from Bahir Dar University in Ethiopia, and a master’s degree in development policy from KDI School in South Korea. He worked as graduate assistant (from June 2012-August 2014) and later as lecturer of economics (from December 2015-August 2017) in Jimma University. He subsequently earned a second master’s degree in Comparative Local Development from a consortium of four European universities (iCorvinus University of Budapest, University of Regensburg, University of Trento and University of Ljubljana) and worked as an intern at the Leibniz Institute for East and Southeast European Studies in Regensburg, Germany.  In his first master's thesis, he decomposed economic growth in selected African countries.  His second thesis analyzed the causal relationship between energy consumption and economic growth in east African countries. 

Main fields of interest: Development Economics, Energy Economics, International Trade, Labor Economics, Data Science.

Tobias Büscher

Tobias Büscher

Entry: 2020

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen 

Tel. +49 201 8149-508

Tobias Büscher joined the Ruhr Graduate School in Economics in October 2020. He obtained his Bachelor in Economics at the University of Münster and his Master in Economics at TU Dortmund University. In his studies he focused on applied economics in the fields of environmental and public economics in a regional context. In his master thesis he conducted a survival analysis and examined the effects of a strong publicly funded research environment in a region on the longevity of digital firm clusters. He showed that the connectedness of high-tech firms to such a research environment decreases the risk of failure. During his studies Tobias Büscher also worked as a student research assistant at the chair of Public Economics run by Prof. Galina Zudenkova.

Main fields of interest: Public Economics, Regional Economics, Environmental Economics.

Dejan Dragutinovic

Dejan Dragutinovic

Entry: 2019

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Dejan Dragutinovic joined Ruhr Graduate School in Economics in October of 2019. Previously, he obtained his BSc  from the University of Belgrade and MSc from the University of Jena. During his studies he worked as a student assistant for Prof. Andreas Freytag (Chair of Economic Policy) who also supervised his master thesis. The thesis examined whether a new constitution, given that it fulfills certain criteria, can serve as a basis for the transition of society from a limited to an open order. Moreover, he has done research on the dynamics of growth, poverty and inequality in different political regimes.

Main fields of interest: Political Economy, Constitutional Economics, Public Economics

Marvin Finkemeier

Marvin Finkemeier

Entry: 2020

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Tel. +49 201 8149-503

Marvin Finkemeier joined the Ruhr Graduate School in October 2020.
He obtained a Bachelor's degree in Economics and a Master's degree in Eco-
nomic Research from the University of Bonn. During his studies he worked
as a teaching assistant for undergraduate courses in Econometrics and Microeconomics.
His research focus lies on Microeconomic Theory, in particular on Auction
Theory and Bargaining Games. As part of his master thesis, he considered
a procurement auction setup with differentiated goods and information dis-
closure by a buyer. The main result of the work is that a certain type of
information disclosure leads to lower price bids by sellers and hence makes
the buyer better off.

Main fields of interest: Microeconomics, Game Theory, Auction Theory

Viola Helmers

Viola Helmers

Entry: 2020

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen 

Tel. +49 201 8149-515

Viola Helmers joined the Ruhr Graduate School in October 2020. She obtained a Bachelor’s degree in Environmental and Resource Management from BTU Cottbus-Senftenberg, a Master’s degree in Agricultural and Food Economics from Bonn University, and a Master’s degree in Management, Economics, and Consumer Studies from Wageningen University and Research (WUR) in the Netherlands. She specialized in Environmental and Resource Economics and has worked as research assistant at Bonn University, WUR, and the Center for Development Research (ZEF) in Bonn. Her Master’s thesis was an empirical impact evaluation of the German Aviation Tax’s effect on passenger numbers using panel data and difference-in-differences modelling. In September 2020 she joined the RWI’s Environment and Resource department as a research assistant.

Main fields of interest: Environmental and Climate Economics, Empirical Policy Evaluation, Applied Econometrics

Sören Ivens

Sören Ivens

Entry: 2019

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Soeren Ivens joined the Ruhr Graduate School in Economics in October 2019. He studied Economics at the University of Mannheim and at the NOVA School of Business and Economics in Lisbon with a main emphasis on macroeconomics and economic policies. In his master thesis he focused on the intersection of macroeconomics and finance. In particular, he investigated empirically the bidirectional relationship between the yield curve and macroeconomic factors - like the monetary policy rate or inflation - by applying a latent-factor model. Before joining the Ruhr Graduate School he already worked as a fulltime research assistant at the IfM Bonn and interned at the Deutsche Bank. 

Main fields of interest: Macroeconomics, Labor Economics, Inequality, Public Economics

Roman Klauser

Roman Klauser

Entry: 2019

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Tel.: +49 (201) 81 49-515
Fax: +49 (201) 81 49-200

Roman Klauser joined the Ruhr Graduate School in Economics in October 2019. He obtained his Bachelor's as well as Master's degree in economics from the Ruhr University Bochum. In his Master thesis he compared the forecasting accuracy of different models for high dimensional realized correlation matrices. During his studies he worked as a student teaching assistant at the Chair of Statistics/Economtrics. Additionaly he also worked as a student assistant for Prof. Dr. Riedel at the Chair of Public Finance and Economic Policy.

Main fields of interest: Applied Econometrics, Microeconometrics, Labor 
Economics, Financial Econometrics 

Lennard Maßmann

Lennard Maßmann

Entry: 2020

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Tel. +49 201 8149-525

Lennard Maßmann joined the Ruhr Graduate School in Economics in October 2020. He obtained his Bachelor’s degree in International Development and Economics from the University of Bayreuth and his Master’s degree in Economics from the WWU Münster. During his Bachelor’s program he spent a semester abroad at the University of Karlstad in Sweden and worked as a student assistant at the Chair of Money and International Economics. In the course of his Master’s program, he worked as a student assistant at the Chair of Political Economy, the Institute for Econometrics and Economic Statistics and as a working student for the financial consultancy zeb. He further completed various internships as a Data Scientist, e.g. at Westphalia DataLab or Miele & Cie. KG. In his thesis, he focused on price volatility forecasting using neural networks.

 

Main fields of interest: Econometrics, Machine Learning, Causal Inference, Statistical Learning, Time Series Analysis 

Dominik Mark Maxara

Dominik Mark Maxara

Entry: 2019

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Dominik Maxara joined the Ruhr Graduate School in Economics in October 2019. He obtained his Bachelor and Master in Mathematics and Economics at TU Dortmund University. He focused his studies on Optimization, Industrial Organization and Game Theory. In his master thesis he combined his majors in Mathematics and Economics and analyzed the effects of Robust Optimization in the Stackelberg duopoly under asymmetric information. He showed that the informational disadvantage in this market competition is not necessarily harmful and can result in both contestants increasing their profit. During his courses Dominik Maxara also worked as Graduate Assistance at the chair of Microeconomics run by Prof. Dr. Wolfgang Leininger. 

Main fields of interest: Microeconomics, Industrial Organization, Public Economics, Political Economy

Ralf Metzler

Ralf Metzler

Entry: 2019

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Ralf Metzler joined the Ruhr Graduate School in Economics in October 2019. He obtained his bachelors’s and master’s degrees in Business Administration from the Mercator School of Management at University of  Duisburg-Essen. His focus lies on risk management in financial institutions and structured finance. In his master’s thesis he studied  how complexity in Asset-Backed Securities relates to the security's ex post performance as well as to the ex ante risk perception of investors. During his studies he also completed several internships in financial  institutions, such as HSBC and Bankhaus Lampe.

Main fields of interest: Risk Management in Financial Institutions, Structured Finance, Financial Econometrics

David Schulze

David Schulze

Entry: 2019

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

David Schulze joined the Ruhr Graduate School in Economics in October 2019. He completed a Bachelor degree in Economics and a Master in Economics and Management Science at Humboldt-University Berlin. In his Master thesis he investigated regional spillovers and the impact of digitization on Chinese regions. He has altogether spent three years in China, the last one studying Economics at Zhejiang University in Hangzhou. He has worked for two years as a research assistant in the Asia Division at Stiftung Wissenschaft und Politik, the German Institute for International and Security Affairs in Berlin, analyzing the local and transnational economics and politics of digitization in China, among other topics.
 
Main fields of interest: Innovation Economics and Policy, Spatial and Regional Economics, Applied Econometrics

Patrick Thiel

Patrick Thiel

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Patrick Thiel joined the Ruhr Graduate School in Economics in October 2019. He studied Economics and Psychology (B.Sc.) at the University of Halle and Economics with focus on policy consulting (M.Sc.) at the Otto-von-Guericke University Magdeburg. During his master studies, he also worked as a student assistant at the Chair of Empirical Economics. Furthermore, he spent one semester abroad at the Georgia College and State University (USA). In his master thesis, he empirically analysed the impact of sports events on the incumbency advantage in mayoral elections.

Main fields of interest: Energy and Environmental Economics, Applied Microeconometrics, Economic History

 Philip Manuel Waidhas

Philip Manuel Waidhas

Entry: 2019

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen

Manuel Waidhas joined the Ruhr Graduate School in Economics in October 2019. He obtained his Bachelor’s and Master’s degrees in Business Mathematics at TU Dortmund University and focused his studies on numerical mathematics and finance. In his Bachelor's thesis supervised by Stefan Turek, he worked on developing numerical algorithms to efficiently approximate distances based on partial differential equations. In his Master's thesis supervised by Peter Posch, he analyzed the ability of neural networks to predict price changes of futures contracts based on forward curves.

Main fields of interest: Financial Economics, Monetary Economics, Machine Learning

Platzhalter3

Serife Yasar

Entry: 2020

Ruhr Graduate School in Economics
c/o RWI
Hohenzollernstr. 1-3
45128 Essen 

Tel. +49 201 8149-523

Serife Yasar joined the Ruhr Graduate School in Economics in October 2020. She obtained her Bachelor's degree in business administration from the University of Duisburg-Essen and received her Master’s degree in economics from the Heinrich-Heine-University Düsseldorf. In her Master thesis, she empirically evaluated how rental prices shape urban structures in the sate of North-Rhine Westphalia, Germany 

 

Main fields of interest: Labor Economics, International Trade, Public Economics, Urban Economics