Member of the following professional associations (in the past or currently, excerpt):

• European Economic Association (EEA), founding member, Netherlands
• American Economic Association (AEA), USA
• Society for the Advancement of Socioeconomics (SASE), President of the Austria Chapter
• International Schumpeter Society (ISS), Germany & USA, member of the board and member of the editorial board of its journal: Journal of Evolutionary Economics (till 98)
• Verein fuer Socialpolitik, Germany
• 'Ausschuss fuer Evolutorische Oekonomik' of the 'Verein fuer Socialpolitik', Germany
• Grazer Schumpeter Gesellschaft, Austria
• Austrian Economic Association (NÖG), Austria
• European Association for Evolutionary Political Economy (Scientific Development Officer in the Council of EAEPE), United Kingdom, Italy, Germany
• New York Academy of Sciences, USA
• Coordinator of the Research Area 'Value and Needs' of EAEPE, United Kingdom
• Coordinator of the Research Area 'Global Economic Policy' of EAEPE, United Kingdom, Italy, Germany
• Eastern Economic Association (EEA), USA
• Atlantic Economic Society (AES), USA
• International Input-Output Association (IIOA), USA & Austria
• International Network for Economic Method (INEM), Hong Kong & USA
• Institute of Electrical and Electronics Engineers (IEEE), USA
• American Information Society (A.I.S.), USA
• International Research Fellow at the International Center for Electronic Commerce (ICEC), Seoul (Korea).
• European center for e-commerce and internet law, 'europäisches zentrum für e-commerce und internetrecht', member of the international scientific council, Vienna.
• Punchline Sciences, 'Verein zur Förderung technisch-wirtschaftswissenschaftlicher Forschung', (president), Vienna
• Exystence, Network of exCEllence for complex systems, (member), EU network.
• Game Theory Society (GTS), (member), Netherlands.
• Austria China Business Association ACBA, (member), Austria.
• International Herbert A. Simon Society, (member), Italy.

Member of the following institutional bodies (in the past or currently, excerpt):

• Faculty of the University of Technology, Vienna
• Dpt. Head of the Institute of Economics of the University of Technology, Vienna
• Head of the "Studienkommission Wirtschaftsinformatik" of University of Technology, Vienna
• Member of the "Fachkommission Mathematik" of University of Technology, Vienna
• Member of the "Dienststellenausschuss (Betriebsrat)" of University of Technology, Vienna
• Member of the Senate of the University of Technology, Vienna
• Faculty of the Donau University, Krems (EURAS)
• Member of the Ludwig Boltzmann Gesellschaft (head of the Institute for Monetary PEconomics), Vienna
• Member of the Research Unit Socioeconomics at the Austrian Academy of Sciences (deputy head of Socioeconomics at OeAW), Vienna
• Faculty of the University of London SOAS (research professor at the economics department), London
• Research Fellow at the International Centre of Electronic Commerce (Seoul, Korea)
• Member of the committee of Austrian experts for "targeted socio-economic research" in the 5th EU research program
• Member of the Group of Jean Monnet Chairs at (EAECE) of the European Commmission, EU.