Ad Hoogsteder is the managing director of SEOR. He is also director of ERBS.

Arie Gelderblom
Senior researcher, project manager

Arie Gelderblom is an economist specialised in labour market theory, the economics of training and education and the position of older workers.

Arie-Jan van der Toorn
Junior researcher

Arie-Jan van der Toorn has studied policy economics at Erasmus University Rotterdam.

Elbert Dijkgraaf is professor of empirical economics of the public sector. He is specialized in competition and regulation, and political issues.

Elisa de Vleeschouwer
Junior researcher

Elisa de Vleeschouwer graduated in Economics at Tilburg University with the specialisation Resources, Development and Growth.

Enrico Pennings is professor of applied economics, specialized in industrial organisation, strategy and innovation.

Jaap de Koning
Scientific director

Jaap de Koning is scientific director of SEOR and professor of labour market policy. He has a broad experience in labour market research and a background in econometrics.

Jan van Ours

Jan van Ours is professor of applied economics, expert in labour market research (in particular from elderly) and research methods and techniques.

Joris Meijaard has nearly 20 years of experience in evaluating innovation and entrepreneurship policies and analysing regional and sectoral development.

Kees Zandvliet
Senior researcher, project manager

Kees Zandvliet is specialised in policy evaluations and labour market research of specific sectors, occupations, groups and regions.

Mostafa Zeriouh is responsible for the financial management of SEOR.

Paul de Hek
Senior researcher, project manager

Paul de Hek is specialised in quantitative methods and techniques, mainly in the field of labour economics, micro- and macroeconomics.

Romain Rey studies both economics and business economics and social sciences at Utrecht University.

Roy Thurik

Roy Thurik is emeritus professor of economics and entrepreneurship at the Erasmus University Rotterdam and Montepellier Business School.

Yara van Hamburg
Office manager, junior project officer

Yara van Hamburg is engaged in various activities for all projects of SEOR. Furthermore, she is responsible for the office management and administration.

Yvonne Prince
Deputy director

Yvonne Prince is deputy director of SEOR. She has nearly 30 years of experience in applied policy research and is specialized in topics such as innovation and competition.


SEOR is an independent social economic research organisation linked to the Erasmus School of Economics and provides research and advisory services to both public and private sector clients worldwide.


  • Address:
  • Rotterdam Science Tower
    Marconistraat 16, 11th floor
    3029 AK Rotterdam
  • Telephone:
  • +31 (0)10 302 0500
  • Email:
  • seor-secr@seor.eur.nl


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