Professor Niels Johannesen, Director

Niels Johannesen is Director of the Oxford University Centre for Business Taxation at Saïd Business School and a part-time Professor of Economics at the University of Copenhagen.

Niels joined the School in 2023 after more than 10 years at the University of Copenhagen.

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Professor John Vella, Director (Law)

John Vella is Professor of Law at the University of Oxford and works primarily on tax law and policy. He is also Director (Law) of the Oxford University Centre for Business Taxation based at the Saïd Business School, a co-director of the MSc in Taxation and a non-tutorial Fellow of Harris Manchester College.  

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Professor Michael Devereux, Director (Emeritus)

Michael Devereux is Emeritus Director of the Oxford University Centre for Business Taxation, having been Director from 2006 until 2023. He is Professor of Business Taxation at the Saïd Business School and a Professorial Fellow at Oriel College. 

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Research Fellows


Dr Kristoffer Berg

Kristoffer Berg is a Research Fellow in Economics at the Centre for Business Taxation. Kristoffer’s research focuses on optimal taxation, fair tax policies, and behavioural responses to taxation. He is also a Junior Research Fellow at Corpus Christi College. 

Prior to joining the centre, Kristoffer was a Doctoral Research Fellow at the University of Oslo, where he completed his PhD in August 2021.

Personal website

Dr Ander Iraizoz

Ander Iraizoz is a Research Fellow in Economics at the Centre for Business Taxation. Ander’s research focuses on empirical public economics and he studies the effects of pension policies and taxation. Ander is also a Lillian Goldman Junior Research Fellow at Regent’s Park College.

Ander completed his PhD in Economics at the Paris School of Economics in 2023. 

Personal website

Dr Jawad Shah

Jawad Shah is a Research Fellow in Economics at the Centre for Business Taxation. Jawad’s research focuses on evasion and enforcement issues in taxation of businesses in developing countries. In his recent research, he studies the behaviour of Value Added Tax (VAT) registered firms in economies with large informal sectors. 


Personal website

Dr Nicolas Traut

Nicolas Traut is a Research Fellow in Law at the Oxford University Centre for Business Taxation. His research interests lie in the fields of private, business and tax law. He is also interested in comparative legal perspectives.

Prior to joining the Centre, Nicolas taught and researched at the University of Konstanz. 

Personal website





Gemma Mumford, Centre Manager

Gemma joined the CBT in 2024 as the Centre Manager. She is responsible for managing the administrative work associated with the Centre, its finances, and the logistical arrangements involved in running the Centre’s events and conferences.


Alison Meeson, Administration Assistant

Alison Meeson joined the CBT in 2019 as the Centre Administrative Assistant to assist with the administrative duties associated with the running of the Centre.


Associate Fellows


Stephen Bond

Professor Stephen Bond

Stephen Bond is Senior Research Fellow at Nuffield College and a Professor in the Department of Economics, University of Oxford. He was previously Deputy Director of the ESRC Centre for Public Policy at the Institute for Fiscal Studies and a member of the IFS Mirrlees Review editorial team.

Personal website

Dr Richard Collier

Richard Collier is a qualified lawyer and chartered accountant, and a former partner at PwC. He has been very closely involved with the work of the OECD since the late 1990s and was especially active in the BEPS project.

He has worked on a wide range of research projects for CBT, especially on tax treaties and transfer pricing, the implications of the BEPS project and more fundamental reform. Richard also teaches on the MSc in Taxation at the Oxford Law Faculty.

Personal website


Picture of Clemens Fuest

Professor Clemens Fuest

Clemens Fuest is President of the Ifo Institute in Munich. Prior to that he was President and Director of Science and Research of the Centre for European Economic Research (ZEW) in Mannheim, and Research Director of the CBT. He is a Research Fellow of CESifo and IZA and is a member of the Academic Advisory Board of the German Federal Ministry of Finance.

Personal website


Picture of Ben Lockwood

Professor Ben Lockwood

Ben Lockwood is Professor of Economics at the University of Warwick. He is a Research Fellow of CEPR and CESifo and a member of the editorial boards of Social Choice and Welfare and the Journal of Macroeconomics. He is a member of the Board of Management of the International Institute of Public Finance and has acted as a consultant on tax policy for the IMF and PwC.

Personal website




Johannes Becker

Professor Johannes Becker

Johannes Becker, Professor of Economics and Director of the Institute of Public Economics, University of Münster

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Katarzyna Bilicka

Associate Professor Katarzyna Bilicka

Katarzyna Bilicka, Lars Peter Hansen Associate Professor of Economics and Statistics at Utah State University

Personal website


Sarah Clifford

Associate Professor Sarah Clifford

Sarah Clifford, Associate Professor at the Department of Economics, University of Oxford and a Tutorial Fellow at St Hugh's College

Personal website


Rita de la Feria

Professor Rita de la Feria

Rita de la Feria, Professor of Tax Law, University of Leeds

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irem guceri

Associate Professor İrem Güçeri

İrem Güçeri, Associate Professor at Blavatnik School of Government, University of Oxford

Personal website


Li Liu

Li Liu, Senior Economist

Li Liu, Senior Economist in the Fiscal Affairs Department, IMF

Personal website


Simon Loretz

Dr Simon Loretz

Simon Loretz, Senior Economist (Public Finances), WIFO

Personal website



alice pirlot

Assistant Professor Alice Pirlot

Alice Pirlot, Assistant Professor of International Law, Geneva Graduate institute

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Nadine Riedel

Professor Nadine Riedel

Nadine Riedel, Director, Institute for Public and Regional Economies, University of Münster

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Martin Simmler Research Fellow

Dr Martin Simmler

Martin Simmler, Research Fellow, Thünen Institute for Rural Economics

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eddy tam

Dr Eddy Tam

Eddy Tam, Lecturer, King's College, London

Personal website


Jing Xing

Dr Jing Xing

Jing Xing, Associate Professor of Finance, Antai College of Economics and Management, shanghai Jiao Tong University

Personal website


International Research Fellows

Rosanne Altshuler, Professor of Economics, Rutgers University 

Alan Auerbach, Professor of Economics and Law, University of California, Berkeley 

Reuven Avi-Yonah, Irwin I. Cohn Professor of Law & Director of the International Tax LLM Program, University of Michigan 

Philip Baker KC, Field Court Tax Chambers 

Johannes Becker, Professor and Director of Institute of Public Economics, University of Münster 

Anne Brockmeyer, Senior Economist at the World Bank

Thiess Büttner, Chair of Public Finance at FAU in Nuremberg 

Tsilly Dagan, Professor of Taxation Law, University of Oxford

Ron Davies, Professor, University College Dublin 

Rita de la Feria, Chair in Tax Law, University of Leeds 

Ruud de Mooij, Advisor, IMF 

Mihir Desai, Mizuho Financial Group Professor of Finance, Harvard Business School 

Dhammika Dharmapala, Professor of Law, Berkeley Law

David Duff, Professor, Peter A. Allard School of Law, University of British Columbia 

Peter Egger, Professor of Applied Economics, ETH Zurich 

Chris Evans, Emeritus Professor, Australian School of Business, University of New South Wales 

Judith Freedman, Emeritus Professor of Tax Law and Policy, Faculty of Law, University of Oxford

Clemens Fuest, President, Ifo Institute for Economic Research 

Malcolm Gammie KC, One Essex Court 

Katarzyna Bilicka, Assistant Professor of Economics, Utah State University 

Andreas Haufler, Professor of Economic Policy, University of Munich 

James Hines, Richard A. Musgrave Collegiate Professor of Economics, University of Michigan 

Eckhard Janeba, Professor of Economics, University of Mannheim 

Michael Keen, Ushioda Fellow, Tokyo College, University of Tokyo and Research Associate, IFS

Christian Keuschnigg, Emeritus Professor of Economics, University of St Gallen 

Kai Konrad, Director, Max Planck Institute for Tax Law and Public Finance

Rick Krever, Professor, University of Western Australia 

Michael Lang, Professor, Vienna University of Economics and Business Administration 

Li Liu, Senior Economist, IMF 

Geoffrey Loomer, Associate Professor, University of Victoria 

Simon Loretz, Senior Economist, WIFO

Glen Loutzenhiser, Professor of Tax Law, University of Oxford

Giorgia Maffini, Special Advisor on Tax Policy and Transfer Pricing, PwC 

Jim Poterba, Mitsui Professor of Economics, MIT 

Nadine Riedel, Professor, University of Münster 

Guttorm Schjelderup, Professor of Economics and Business Economics, Norwegian School of Economics and Business Administration 

Wolfgang Schön, Director, Max Planck Institute for Tax Law and Public Finance 

Douglas Shackelford, Dean and Meade H. Willis Distinguished Professor of Taxation, University of North Carolina 

Daniel Shaviro, Wayne Perry Professor of Taxation, New York University 

Joel Slemrod, Paul W. McCracken Collegiate Professor of Business Economics and Public Policy at the Ross School of Business, and Professor in the Department of Economics, University of Michigan 

Michael Smart, Professor of Economics, University of Toronto 

Peter Birch Sørensen, Professor, University of Copenhagen 

Christoph Spengel, Professor for International Business Taxation, University of Mannheim

Miranda Stewart, Professor and Director of Tax, Melbourne University Law School 

Richard Vann, Professor Emeritus, University of Sydney 

Johannes Voget, Chair of Taxation & Finance, University of Mannheim 

Michael Walpole, Professor of Taxation Law, University of New South Wales 

Alfons Weichenrieder, Professor of Economics and Public Finance, University of Frankfurt

David Weisbach, Walter J. Blum Professor of Law, University of Chicago 

Jing Xing, Associate Professor of Finance, Antai College of Economics and Management, Shanghai Jiao Tong University