Fotograaf: Bram Belloni

dhr. prof. dr. L.A. (Loet) Leydesdorff


  • Faculteit der Maatschappij- en Gedragswetenschappen
    Groep: Docenten & onderzoekers CW
  • Bezoekadres
    REC BC
    Nieuwe Achtergracht 166  Amsterdam
    Kamernummer: C8.00
  • Postadres:
    Postbus  15791
    1001 NG  Amsterdam
  • L.A.Leydesdorff@uva.nl

Loet Leydesdorff (Ph.D. Sociology, M.A. Philosophy, and M.Sc. Biochemistry) is Professor in the Dynamics of Scientific Communication and Technological Innovation at the Amsterdam School of Communications Research ( ASCoR ) of the University of Amsterdam . He is Honorary Professor of SPRU - the Science and Technology Policy Research Unit of the University of Sussex; Visiting Professor of the Institute of Scientific and Technical Information of China ( ISTIC ) in Beijing; and of the School of Management of Birkbeck, University of London.

Leydesdorff has published extensively in systems theory, social network analysis, scientometrics, and the sociology of innovation (see for a list of publications at http://www.leydesdorff.net/list.htm ).In 2006, he published The Knowledge-Based Economy: Modeled, Measured, Simulated ( Boca Rotan , FL : Universal Publishers). Previous monographs are: A Sociological Theory of Communication: The Self-Organization of the Knowledge-Based Society (2001) and The Challenge of Scientometrics: The development, measurement, and self-organization of scientific communications (1995).

With Henry Etzkowitz, he initiated a series of workshops, conferences, and special issues about the Triple Helix of University-Industry-Government Relations . He received the Derek de Solla Price Award for Scientometrics and Informetrics in 2003 and held "The City of Lausanne " Honor Chair at the School of Economics , Université de Lausanne, in 2005.In 2007, he was Vice-President of Computing Anticipatory Systems (CASYS'07).

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

  • K. Frenken & L.A. Leydesdorff (2004). Scientometrics and the evaluation of European integration. In J. Ulijn & T. Brown (Eds.), Innovation, entrepreneurship and culture: The interaction between technology, progress and economic growth (pp. 87-102). Cheltenham, UK and Northhampton: MA: Edward Elgar Publishing.
  • P. Zhou & L.A. Leydesdorff (2004). China's research outcome in nantoch takes the lead in the world in 2004: The world position of China's publications (original in Chinese). Chinese S&T daily, 23 oktober 2004.
  • H.W. Park & L.A. Leydesdorff (2004). Understanding the KrKwic: A computer program for the analysis of Korean text (original in Korean Language). Journal of the Korean Data Analysis Society, 6 (5), 1377-1387.
  • L.A. Leydesdorff (2004). La triple elica delle relazioni sistemiche tra strat mercato e universita. Desk.
  • P.F. Wouters, I. Hellsten & L.A. Leydesdorff (2004). Internet time and the reliability of search engines. First Monday, 9 (10).
  • L.A. Leydesdorff (2004). Clusters and maps of science journals based on bi-connected graphs in the journal citation reports. Journal of Documentation, 60 (4), 371-427. doi: 10.1108/00220410410548144
  • L.A. Leydesdorff & D. Dubois (2004). Anticipation in social systems. International Journal of Computing Anticipatory Systems, 15, 203-216.
  • L.A. Leydesdorff (2004). The evaluation of research and the scientometric research program: A methodological turn. Studies in Science of Science, 22 (3), 226-232.
  • C. Fischer, L.A. Leydesdorff & M. Schophaus (2004). Science shops in Europe: The public as stakeholder. Science and Public Policy, 31 (3), 199-211.
  • L.A. Leydesdorff (2004). Top-down decomposition of the journal citation report of the social science citation index: Graph- and factor-analytical approaches. Scientometrics, 60 (2), 159-180. doi: 10.1023/B:SCIE.0000027678.31097.e0
  • L.A. Leydesdorff (2004). The university-industry knowledge relationship: Analyzing patents and the science base of technologies. Journal of the American Society for information Science and Technology, 55 (11), 991-1001. doi: 10.1002/asi.20045
  • H.W. Park, L.A. Leydesdorff, H.D. Hong & S.J. Hong (2004). Triple-helix indicators for the knowledge-based innovation system: A comparison between South Korea and The Netherlands. Journal of the Korean Data Analysis Society, 6 (5), 1389-1402.

2003

  • L.A. Leydesdorff & M. Meyer (Eds.). (2003) Scientometrics, 58(2).
  • R. Viale & L.A. Leydesdorff (2003). Qualità e quantità nella scientometria. In R. Viale & A. Cerroni (Eds.), Valutare la Scienza (pp. 21-45). Soveria Mannelli: Rubettino.
  • L.A. Leydesdorff (2003). "Interaction" versus "action", and Luhmann's socioloy of communication. In C.B. Grant (Ed.), Rethinking Communicative Interaction: New Interdisciplinary Horizons (pp. 163-186). New York: John Benjamins.
  • L.A. Leydesdorff (2003). Ke Xue Ji Liang Xue De Tiao Zhan: Ke Xue Jiao Liu de Fa Zhen ce du he Zi Zu Zhi. Beijing: Scientific and Technical Documents Publishing House.
  • L.A. Leydesdorff & H. dr. Etzkowitz (2003). Can "The Public" be considered as a fourth helix in University-Industry-Government relations? Science and Public Policy, 30 (1), 55-61.
  • L.A. Leydesdorff (2003). A methodological perspective on the evaluation of the promotion of university-industry-government relations. Small Business Economics, 20 (2), 201-204. doi: 10.1023/A:1022272201042
  • C.S. Wagner & L.A. Leydesdorff (2003). A study of seismology as a dynamic, distributed area of scientific research. Scientometrics, 58 (1), 89-112.
  • L.A. Leydesdorff & M. Meyer (2003). The triple helix of University-Industry-Government relations: Introduction to the topical issue. Scientometrics, 58 (2), 191-203. doi: 10.1023/A:1026276308287
  • L.A. Leydesdorff (2003). The mutual information of University-Industry-Government relations: An indicator of the Triple Helix Dynamics. Scientometrics, 58 (2), 445-467. doi: 10.1023/A:1026253130577
  • L.A. Leydesdorff (2003). Empirical evidence of self-organization? A rejoinder. Journal of the American Society for information Science and Technology, 54 (8 + 11).
  • L.A. Leydesdorff (2003). Can networks of journal-journal citations be used as indicators of change in the social sciences? Journal of Documentation, 59 (1), 84-104. doi: 10.1108/00220410310458028
  • L.A. Leydesdorff (2003). The construction and globalization of the knowledge base in inter-human communication systems. Canadian Journal of Communication, 28 (3), 267-289.

2002

  • L.A. Leydesdorff (2002). Technology transfer in European regions: Introduction to the Special Issue. Journal of Technology Transfer, 27 (1), 5-13.
  • L.A. Leydesdorff (2002). The complex dynamics of technological innovation: A comparison of models using cellular automata. Systems Research and Behavioral Science, 19 (2), 563-575. doi: 10.1002/sres.482
  • L.A. Leydesdorff (2002). The Communication turn in the Theory of Social Systems. Systems Research and Behavioral Science, 19 (2), 129-136. doi: 10.1002/sres.436.abs
  • L.A. Leydesdorff (2002). Indicators of structural change in the dynamics of science: Entropy statistics of the SCI Journal citation reports. Scientometrics, 53 (1), 131-159. doi: 10.1023/A:1014892106059
  • L.A. Leydesdorff (2002). Dynamic and evolutionary updates of classificatory schemes in scientific journal structures. Journal of the American Society for information Science and Technology, 53 (12), 987-994. doi: 10.1002/asi.10144
  • L.A. Leydesdorff (2002). De non-lineaire dynamica's van wetenschappelijke en technologische ontwikkelingen. In M.F. van den Bergh, R.A. de Klerk & G.J. de Reuver (Eds.), Bouwen aan academisch onderwijs: Verkenningen bij gelegenheid van het afscheid van professor Karel van Dam (pp. 91-98). Amsterdam: Universiteit van Amsterdam.
  • L.A. Leydesdorff (2002). Regime Changes and Sustainable Development. In W. Aans (Ed.), Complex Dynamics. Wageningen: Studium Generale.
  • L.A. Leydesdorff (2002). Complexity and technology. In Encyclopedia of Life Support Systems (EOLSS). Oxford, UK: Eolss Publishers.
  • L.A. Leydesdorff, P. Cooke & M. Olazaran (2002). Special issue: Regional Innovation Systems in Europe. Journal of Thechnology Transfer (27, 1). onbekend: onbekend.
  • H. dr. Etzkowitz & L.A. Leydesdorff (2002). Universities and the global knowledge economy: A Triple Helix of University-Industry-Government Relations. London / NewYork: Continuum.
  • L.A. Leydesdorff (2002). De non-lineaire dynamica's van wetenschappelijke en technologische ontwikkelingen. Tijdschrift voor Wetenschap, Technologie en Samenleving, 1, 16-19.
  • L.A. Leydesdorff (2002). Byzonytalansag es az "ído" kommunikacioja, Informacios Tarsadalom. The Hungarian Information Society, 11 (2), 40-59.
  • L.A. Leydesdorff (2002). Some epistemological implications of semiosis in the social domain. Semiotics, Evolution, Energy, and Development (SEED) Journal, 2 (3), 60-83.
  • L.A. Leydesdorff (2002). May there be a 'Socionomy" beyond "Sociology"? SCIPOLICY - The Journal of Science and Health Policy, 2 (1).

2001

  • L.A. Leydesdorff (2001). Why Catalonia cannot be considered as a Regional Innovation System. Scientometrics, 50 (2), 215-240.
  • L.A. Leydesdorff (2001). El nuevo régimen de comunicacion en las relaciones Universidad-Empresa-Gobierno: Una triple hélice de innovaciones. Ekonomiaz, 45 (3), 60-77.
  • L.A. Leydesdorff (2001). Technology and culture: The dissemination and the potential 'lock-in' of new technologies. Journal of Artificial Societies and Social Simulation, 4 (3).
  • L.A. Leydesdorff (2001). Scientometrics and science studies. Bulletin de Méthodologie Sociologique, 71, 79-91.
  • L.A. Leydesdorff (2001). Indicators of innovation in a knowledge-based economy. Cybermetrics, 5 (1).
  • L.A. Leydesdorff & H. dr. Etzkowitz (2001). The transformation of university-industry-government relations. Electronic Journal of Sociology, 5 (4).
  • L.A. Leydesdorff & Z. Guoping (2001). University-Industry-Government Relations in China: An emergent national system of innovations. Industry and Higher Education, 15 (3), 179-182.
  • L.A. Leydesdorff & G.J. Heimeriks (2001). The self-organization of the European information society: The case of "biotechnology". Journal of the American Society for information Science and Technology, 42 (14), 1262-1274.

2000

1998

  • L.A. Leydesdorff & H. dr. Etzkowitz (1998). Technology Innovation in a Triple Helix of University-Industry-Government Relations. Asia Pacific Tech Monitor, 15 (1), 32-38.
  • H. dr. Etzkowitz & L.A. Leydesdorff (1998). A Triple Helix of University-Industry-Government Relations. Industry and Higher Education, 12, 197-201.
  • L.A. Leydesdorff & R. de Klerk (1998). An innovating introductory course at the University of Amsterdam. International Journal of Science Education, 20, 15-23. doi: 10.1080/0950069980200102
  • L.A. Leydesdorff (1998). Reply About Using Co-Words. Journal of the American Society for Information Science, 49, 98-99.
  • L.A. Leydesdorff & H. dr. Etzkowitz (1998). The Triple Helix as a model for innovation studies. Science and Public Policy, 25 (3), 195-203.
  • L.A. Leydesdorff (1998). Theories of Citation. Scientometrics, 43, 5-25. doi: 10.1007/BF02458391
  • H. dr. Etzkowitz & L.A. Leydesdorff (1998). The Endless Transition: A "Triple Helix" of University-Industry-Government Relations. Minerva, 36, 203-208.
  • L.A. Leydesdorff & H. dr. Etzkowitz (1998). Triple Helix of innovation: Introduction. Science and Public Policy, 25 (6), 358-364.

1997

  • L.A. Leydesdorff (1997). The `Post-Institutional' Perspective: Society as an emerging system with dynamically changing boundaries. Soziale Systeme, 361-378.
  • L.A. Leydesdorff (1997). The Non-linear Dynamics of Sociological Reflections, International Sociology 12. International Sociology, 25-45.
  • L. Leydesdorff & P. van den Besselaar (1997). Scientometrics and Communication Theory: Towards Theoretically Informed Indicators. Scientometrics, 155-174.
  • L.A. Leydesdorff (1997). Why Words and Co-Words Cannot Map the Development of the Sciences. Journal of the American Society for Information Science, 418-427.
  • L.A. Leydesdorff (1997). Sustainable Technological Developments and Second-Order Cybernetics. Technology Analysis & Strategic Management, 329-341.
  • L. Leydesdorff & P.A.A. van den Besselaar (1997). Scientometrics and communication theory: towards theoretically informed indiators. Scientometrics, 38, 155-174. doi: 10.1007/BF02461129

1996

1995

2014

  • L. Leydesdorff (2014). Can inter-human communications be modeled as "autopoietic"? Constructivist Foundations, 9 (2), 168-170.[go to publisher's site]
  • L. Leydesdorff (2014). De choreometrie van universiteit-industrie-overheidsrelaties: een dans rond de mousse-aux-trois-chocolats. In H. de Regt & C. Kwa (Eds.), Building bridges: connecting science, technology and philosophy: essays presented to Hans Radder (pp. 85-88). Amsterdam: VU University Press.

2013

2012

2011

2009

2007

  • L. Leydesdorff (2007). Indicators of structural change in the dynamics of science: Entropy statistics of the SCI Journal Citation Reports. In T. Braun (Ed.), The impact factors of scientific and scholarly journals. Its use and misuse (pp. 97-126). Budapest, Hungary: Akadémiai Kiadó.
  • L.A. Leydesdorff & M. Meyer (Eds.). (2007) Scientometrics, 70(2).
  • L.A. Leydesdorff & M. Meyer (Eds.). (2007) Scientometrics, 70(2).
  • L.A. Leydesdorff & M. Meyer (2007). The scientometrics of a Triple Helix of university-industry-government relations (Introduction to the topical issue). Scientometrics, 70 (2), 702-722.
  • L.A. Leydesdorff (2007). Luhmann's communication-theoretical specification of the 'Genomena' of Husserl's phenomenology. In E. Balsemão Pires (Ed.), Public space, power and communication (pp. 233-243). Coimbra, Spain: Edições Afrontamento.
  • L.A. Leydesdorff (2007). A kommunikáció szociológiai elmélete: Társadalmi kommunikáció sorozat (translated by Jakab András). Budapest: Typotext.
  • L.A. Leydesdorff (2007). Top-down decomposition of the journal citation report of the social science citation index: Graph- and factor-analytical approaches. In T. Braun (Ed.), The impact factors of scientific and scholarly journals. Its use and misuse (pp. 127-148). Budapest, Hungary: Akadémiai Kiadó.
  • L.A. Leydesdorff (2007). "Während auf hoher See ein Sturm tobt...": Innovationssysteme, regionale Entwicklung und wissensbasierte Ökonomie aus der Perspektive des Triple-Helix-Modells. In H. Pahl & L. Meier (Eds.), Kognitiver Kapitalismus (pp. 163-193). Marburg, Germany: Metropolis Verlag.

2006

  • L.A. Leydesdorff (2006). The knowledge-based economy: Modeled, measured, simulated. Boca Rota: Universal Publishers.
  • L.A. Leydesdorff (2006). The knowledge-based economy and the triple helix model. In W. Dolfsma & L. Soete (Eds.), Understanding the dynamics of a knowledge economy (pp. 42-76). Cheltenham: Edward Elgar.
  • L.A. Leydesdorff (2006, April 22). Waarheid. NRC Handelsblad
  • R.L. Goldstone & L. Leydesdorff (2006). The import and export of cognitive science. Cognitive Science, 30 (6), 983-993. doi: 10.1207/s15516709cog0000_96[go to publisher's site]

2003

  • L.A. Leydesdorff & A. Scharnhorst (2003). Measuring the Knowledge Base: A Program of Innovation Studies. (extern rapport). Berlin: Brandenburgische Akademie der Wissenschaften.
  • L.A. Leydesdorff & J.R. Ward (2003). Communication of Science Shop Mediation: A Kaleidoscope of University-Society Relations, Improving Interaction between NGOs, Universities, and Science Shops: Experiences and Expectations (INTERACTS). (extern rapport). onbekend: onbekend.
  • L. Leydesdorff & P.A.A. van den Besselaar (2003). La scientometria e la teoria della communicazione: verso indicatori basati su informazioni teoriche. In R. Viale & A. Cerroni (Eds.), Valutare la Scienza (pp. 309-330). Soveria Mannelli: Rubbetino.
  • L.A. Leydesdorff (2003, July 01). Innovatie in Nederland. NRC Handelsblad

2002

2001

  • L.A. Leydesdorff (2001). A sociological theory of communication: The self-organization of the knowledge-cased society. Parkland, FL: Universal Publishers.
  • L.A. Leydesdorff (2001). The challenge of scientometrics: The development, measurement, and self-organization of scientific communications (2nd edition). Parkland, FL: Universal Publishers.
  • L.A. Leydesdorff (2001). Universities and the global knowledge economy: A triple helix of university-industry-government relations (2nd edition). Londen/New York: Continuum.
  • L.A. Leydesdorff (2001). Saientometorikus no chosen: kagaku-gijyutsu-joho no jiko-soshiki-ka, translated into Japanese by Y. Fujigaki et al. Tokyo: Tamagawa University Press.
  • L.A. Leydesdorff (2001). The complex dynamics of scientific communication. In C.B. Grant & D. McLaughlin (Eds.), Language-meaning-social construction: Interdisciplinary studies. Amsterdam/Atlanta, GA: Rodopi.
  • L.A. Leydesdorff (2001). Scientometrics. In N.J. Smelser & P.B. Baltes (Eds.), International encyclopedia of the social and behavioral sciences (pp. 13752-13755). Oxford: Elsevier.
  • L.A. Leydesdorff (2001). A triple-helix of university-industry-government-relations: Mode 2 and the globalization of national systems of innovation. In onbekend onbekend (Ed.), Science under pressure: Proceedings (pp. 7-33). Aarhus: Danish Institute for Studies in Research and Research Policy.
  • L.A. Leydesdorff (2001). Science & Public Policy [Review of the book Re-thinking the relations between texts and contexts in science.]. Re-thinking Science: Knowledge and the public in an age of uncertainty., 28(6), 484-486.
  • L.A. Leydesdorff (2001). Evaluation report on the project "Living knowledge: Building partners for access to research" (SciPas). (extern rapport). onbekend: onbekend.
  • L.A. Leydesdorff (2001). Duaal leren: Kennisontwikkeling aan organisatorische interfaces. In G. Dijk, van & H. Visser (Eds.), Studeren en werken: Bouwstenen voor academisch duaal onderwijs (pp. 26-31). Amsterdam: Universiteit van Amsterdam.
  • L.A. Leydesdorff (2001). Innovation inspired: The triple helix of university-industry-government relations. Technology Access Report, 14 (10), 4-6.
  • L.A. Leydesdorff (2001). The international science shop network. EASST Review, 20 (1), 11-12.

2000

  • L.A. Leydesdorff (2000). De ontwikkeling van haarscheurtjes in wetenschapsontwikkeling: De wetenschapsdynamica van de wetenschapsdynamica. Tijdschrift voor Wetenschap, Technologie en Samenleving, 8 (4), 127-131.
  • L.A. Leydesdorff (2000). A triple Helix of University-industry-government relations. Scipolicy, 1 (1), 43-48.
  • L.A. Leydesdorff (2000). Codification and self-organization in the European STI system. (extern rapport). Brussels: TSER, European Commission.
  • L.A. Leydesdorff (2000). Technological development and factor substitution in a non-linear model. Journal of Social and Evolutionary Systems, 21 (2), 173-192.
  • L.A. Leydesdorff (2000). Post-Institutionalism: A regime of fragmentation and translation. Systemica, 12, 229-241.
  • L.A. Leydesdorff (2000). Are EU networks anticipatory systems? An empirical and analytical approach. In D.M. Dubois (Ed.), Computing Anticipatory Systems - CASYS'99 (pp. 171-181). Woodbury, NY: American Physics Institute.
  • L.A. Leydesdorff & H. dr. Etzkowitz (2000). Le Mode 2 et la globalisation des systemes d'innovation nationaux: le modele a triple helice des relations entre universite industrie et gouvernement. Sociologie et Societes, 32 (1), 135-156.
  • L.A. Leydesdorff & M.E. Curran (2000). Mapping university-industry-government relations on the Internet: The construction of indicators for a knowledge-based economy. Cybermetrics, 4 (1).
  • L.A. Leydesdorff (2000). [Review of the book The Cybrarian's Manual 2.]. Journal of Documentation, 57(6), 824-6.

1999

  • G.J. Heimeriks, P.A.A. van den Besselaar, L.A. Leydesdorff, A. Oostveen, M. Riba & D. Ruhl (1999). Codification and self-organization of the European STI system. (extern rapport). x: The Self-organization of the European Information Society.
  • P.A.A. van den Besselaar & L.A. Leydesdorff (1999). A triple helix of University-Industry-Goverment relations. (extern rapport, project PL97-1296 - SOEIS.). X: TSER.

1998

  • H. dr. Etzkowitz & L.A. Leydesdorff (1998). Special issue: A "Triple Helix" of University-Industry-Government Relations [Review of the book -]. .
  • H. dr. Etzkowitz & L.A. Leydesdorff (1998). Special issue: A "Triple Helix" of University-Industry-Government Relations [Review of the book -]. Minerva, 36, 203-288.
  • L. Leydesdorff & P.A.A. van den Besselaar (1998). Competing Technologies: Disturbance, Selection, and the Possibilities of Lock-In. In D. Dubois, B. Teiling & G.E. Lasker (Eds.), Advances in Modeling of Anticipative Systems (pp. 68-72). Windsor: IIAS.
  • L.A. Leydesdorff & P.A.A. van den Besselaar (1998). Competing Technologies: Disturbance, Selection, and the Possibilities of Lock-In. In G.E. Lasker (Ed.), Advances in Support Systems Research, Vol. III: Decision Support Systems and Intelligent Information Systems (pp. 54-58). Windsor: IIAS.
  • L. Leydesdorff & P.A.A. van den Besselaar (1998). Competing technologies, Lock-ins and Lock-outs. In D. Dubois (Ed.), Computing Anticipative Systems. AIP Conference Proceedings 437 (pp. 309-323). Woodbury/NY: American Institute of Physics.
  • L.A. Leydesdorff & P. van den Besselaar (1998). Competing Technologies: Disturbance, Selection, and the Possibilities of Lock-in. In G.E. Lasker (Ed.), Advances in Support Systems Research, Volume III: Decision Support Systems & Intelligent Information Systems (pp. 54-58). Windsor, Ontario: International Institute for Advanced Studies in Systems Rese.
  • L.A. Leydesdorff & P. van den Besselaar (1998). Competing Technologies: Lock-ins and Lock-outs. In D.M. Dubois (Ed.), Computing Anticipatory Systems,Proceedings of the American Institute of Physics (pp. 309-323). New York: Woodbury.
  • L.A. Leydesdorff & H. dr. Etzkowitz (1998). A Triple Helix of University-Industry-Government Relations: The Future Location of Research. New York: SPI, State University of New York at Purchase.
  • L. Leydesdorff & P.A.A. van den Besselaar (1998). Competing technologies, Lock-ins and Lock-outs. In D. Dublois (Ed.), Computing Anticipative Systems (pp. 309-323). New York: National Academy of Physics.
  • L. Leydesdorff & P.A.A. van den Besselaar (1998). Competing technologies: disturbance, selection, and the possibilities of Lock-In. In G.E. Lasker (Ed.), Decision support systems and intelligent information systems (Advances in support systems research, III) (pp. 54-58). Windsor: IIAS.
  • L. Leydesdorff & P.A.A. van den Besselaar (1998). Competing technologies: disturbance, selection, and the possibilities of Lock-In. In G.E. Lasker, D. Dubois & B. Teiling (Eds.), Advances in Modeling of Anticipative Systems (pp. 68-72). Windsor: IIAS.
  • L. Leydesdorff & P.A.A. van den Besselaar (1998). Technological developments and factor substitution in a complex and dynamic system. Journal of Social and Evolutionary Systems, 21 (2), 173-193.

1997

  • L. Leydesdorff & P.A.A. van den Besselaar (1997). Scientometrics and communication theory: towards theoretically informed indicators. Scientometrics, 38, 155-174. doi: 10.1007/BF02461129
  • L. Leydesdorff & P.A.A. van den Besselaar (1997). Competing technologies: disturbance, selection, and the possibilities of Lock-In. In D. Dubois (Ed.), Proceedings of the First Conference on Computing Anticipative Systems (pp. 60-64). Liege: s.n..
  • L.A. Leydesdorff & P.A.A. van den Besselaar (1997). Competing technologies: disturbance, selection and the possibility of lock-ins. In D. Dubois (Ed.), Casys 97: Computing anticipatory systems (part II) (pp. 60-64). Liege: Chaos.
  • L.A. Leydesdorff & P.F. Wouters (1997). Introduction. In L.A. Leydesdorff & H. Etzkowitz (Eds.), Universities and the Global Knowledge Economy: A Triple Helix of University-Industry-Government Relations (pp. 3-5).
  • L.A. Leydesdorff & P.F. Wouters (1997). Quantitative Approaches to Science and Technology Studies. In Special Issue of Scientometrics (pp. 3-218).
  • K. Frenken, L.A. Leydesdorff & P.P. Saviotti (1997). Self-Oragnsiation and the Economics of Technical Change. An Empirical Approach. In A. Orlean & R. Torpol (Eds.), Evolution et Aut-Organisation en Economie. Parijs: Carre des Sciences.
  • L.A. Leydesdorff & H. dr. Etzkowitz (1997). Special Issue on Science Policy Dimensions of the Triple Helix of University-Industry-Government Relations. In Science & Public Policy (pp. 2-52).
  • L.A. Leydesdorff (1997). A Triple Helix of University-Industry-GovernmentRelations. In H. Etzkowitz & L.A. Leydesdorff (Eds.), Universities and the Global Knowledge Economy: A Triple Helix of University-Industry-Government Relations (pp. 155-162).
  • L.A. Leydesdorff (1997). The New Communication Regime of University-Industry-Government Relations. In L.A. Leydesdorff & H. Etzkowitz (Eds.), Universities and the Global Knowledge Economy: A Triple Helix of University-Industry-Government Relations (pp. 106-117).
  • L.A. Leydesdorff & H. dr. Etzkowitz (1997). Introduction: Universities in the Global Knowledge Economy. In L.A. Leydesdorff & H. Etzkowitz (Eds.), Universities and the Global Knowledge Economy: A Triple Helix of University-Industry-Government Relations (pp. 1-8).
  • L.A. Leydesdorff & P. van den Besselaar (1997). Competing Technologies:Disturbance, Selection, and the Possibilities of Lock-in. In D.M. Dubois (Ed.), Computing Anticipatory Systems. Luik.
  • L.A. Leydesdorff & H. dr. Etzkowitz (1997). Introduction. In L.A. Leydesdorff & H. Etzkowitz (Eds.), Universities and the Global Knowledge Economy: A Triple Helix of University-Industry-Government Relations (pp. 2-6).

1996

  • P.A.A. van den Besselaar & L.A. Leydesdorff (1996). The dynamics of sience studies, a reconstruction (paper 4S/EAST). (intern rapport, 96, no 2). Amsterdam: Programmagroep Sociaal Wetenschappelijke.
  • L.A. Leydesdorff & P.F. Wouters (1996). Quantitative Measuring and Qualitative Understanding: Is it possible to bridge the divide in STS? EASST Review, 15 (3), 20-24.
  • P.A.A. van den Besselaar & L. Leydesdorff (1996). Mapping change in scientific specialties: a scientometric case study of the development or artificial intelligence. Journal of the American Society for Information Science, 47 (6), 415-436. doi: 10.1002/(SICI)1097-4571(199606)47:6<415::AID-ASI3>3.0.CO;2-Y
  • K. Frenken & L.A. Leydesdorff (1996). The Co-Evolution of Technical and Market Developments Modeled in Terms of Information Theory. The Case of Civil Aircraft (1923-1999). In Work, Unemployment and Need: `Theory, Evidence, Policies'. Antwerp: European Association for Evolutionary Political Economy.
  • L.A. Leydesdorff (1996). Is a General Theory of Communications Emerging? In G.L. Farre, J.P. Vanbremeersch & A.C. Ehresmann (Eds.), Emergence - Complexit Hirarchique - Organisation: Modles de la boucle volutive. Actes du Symposium ECHO (pp. 121-126). Amiens: Universite de Picardie Jules Verne.
  • L.A. Leydesdorff (1996). The Trans-Episteme of University-Industry-Government Relations. In O. Kaynak & R. Kaykayoglu (Eds.), Proceedings of the International Conference of Technology Management: University/Industry/Government Collaboration (pp. 194-199). Istanbul: Bogazici University.
  • L.A. Leydesdorff & H. dr. Etzkowitz (1996). A Triple Helix of University-Industry-Government Relations. In O. Kaynak & R. Kaykayoglu (Eds.), Proceedings of the International Conference of Technology Management: University/Industry/Government Collaboration (pp. 200-205). Istanbul: Bogazici University.
  • L.A. Leydesdorff & P.A.A. van den Besselaar (1996). Scientometrics and communication theory, toward theoretically informed indicators. (Presented at the Scientometrics Workshop, Amsterdam, May 1996). (intern rapport, 96, no 1). Amsterdam: Programmagroep Sociaal Wetenschappelijke.
  • L.A. Leydesdorff & H. dr. Etzkowitz (1996). The Future Location of Research: A Triple Helix of University-Industry-Government. EASST Review, 15 (4), 20-25.

1995

  • H. dr. Etzkowitz & L.A. Leydesdorff (1995). Universities and the Global Knowledge Economy: A Triple Helix of University-Industry-Government Relations. Amsterdam: University of Amsterdam.
  • L.A. Leydesdorff (1995). The Challenge of Scientometrics: The Development, Measurement and Selforganization of Scientific communications. Leiden: DSWO Press.

1994

  • L.A. Leydesdorff (1994). Book Review of La Scientometrie [Review of the book La Scientometrie]. .
  • L. Leydesdorff, S. Cozzens & P.A.A. van den Besselaar (1994). Tracking areas of strategic importance by using scientometrics journal mappings. Research Policy, 23 (2), 217-229. doi: 10.1016/0048-7333(94)90054-X
  • L.A. Leydesdorff (1994). Een Scientometrische Verkenning van de Biotechnologie. (extern rapport). Amsterdam: Universiteit van Amsterdam.
  • L. Leydesdorff & P.A.A. van den Besselaar (Eds.). (1994). Evolutionary economics and chaos theory: new directions in technology studies. London: Frances Pinter Publishers.
  • L. Leydesdorff, S. Cozzens & P.A.A. van den Besselaar (1994). Tracking areas of strategic importance by using scientometric journal mappings. Research Policy, 23, 217-229. doi: 10.1016/0048-7333(94)90054-X
  • P.A.A. van den Besselaar & L.A. Leydesdorff (Eds.). (1994). Evolutionary economics and chaos theory: New directions in technology studies. Londen: Frances Pinter Publishers.

1993

  • P.A.A. van den Besselaar & L. Leydesdorff (1993). Factorsubstitutie en technologische ontwikkeling in een evolutionair model. International Scientific Journal of methods and Models of Complexity, 2 (1), 5-17.
  • P.A.A. van den Besselaar & L. Leydesdorff (1993). Research performance in AI and Robotics, an international comparison. AI Communications, 6, 83-91.
  • P.A.A. van den Besselaar & L. Leydesdorff (1993). Artificial Intelligence as a research tradition. In M.C. Angelides & J. Siever (Eds.), Proceedings of the AI-stream of the 35th Annual Conference of the Operational Research Society. York, 14-16 sept. 1993 (pp. 57-87). Birmingham: ORS.

1992

  • P.A.A. van den Besselaar & L. Leydesdorff (1992). De Nederlandse bijdrage aan de ontwikkeling van Artificiële Intelligentie. I&I Informatie- en Informatiebeleid, 10 (3), 54-61.

1987

2012

2011

2010

2008

2007

  • L.A. Leydesdorff (2007). The position of Tibor Braun's OEvre: Bibliographic Journal Coupling. In W. Glänzel, A. Schubert & B. Schlemmer (Eds.), The Multidimensional World of Tibor Braun, at the occasion of his 75th birthday. Katholieke Universiteit Leuven: Steunpunt O&O.
  • P.A.A. van den Besselaar & L.A. Leydesdorff (2007). Past performance as predictor of successful grant applications: A case study. Report to the board of the Netherlands Social Science Research council (MaGW/NWO). (extern rapport). Den Haag: Rathenau Institute.

2005

  • L.A. Leydesdorff (2005). Mathematical, Biological, and Computational Explanations [Review of the book Making sense of life: Explaining Biological Development Models, Metaphors, and Machines]. Heredity, 94(4), 458.
  • L.A. Leydesdorff (2005). Journal Maps and Local Impact Factors. Chronicle of Higher Education, 52 (13), A55.
  • W. Dolfsma, L.A. Leydesdorff & G. van der Panne (2005). De kenniseconomie de maat genomen. Economisch-Statistische Berichten, 90 (4469), 366-368.

2004

  • L.A. Leydesdorff (2004, November 25). onbekend. NRC Handelsblad
  • M Sogaard Jorgensen, I Hall, D. Hall, A. Gnaiger, G. Schroffenegger, S. Brodersen, K. von Heiden, R. Reimer, M. Strahle, C. Urban, W. Endler, C Teodosiu, T. Rojo & L.A. Leydesdorff (2004). Democratic governance through interaction between NGOs, universities and science shops: Experiences, expectations, recommendations. Final Report of INTERACTS, EU Fifth Framework Programme. (extern rapport). Amsterdam: ASCoR.
  • C.S. Wagner, J. Cave, L.A. Leydesdorff, V Allee, I. Graafland, R. Perez & M. Botterman (2004). ERAnets: Evaluation of networks of collaboration between participants in IST research and their evolution to collaborations in the European Research Area (ERA). Inception report. ERAnets Technical Report TR-152-EC. (extern rapport). Leiden: RAND Europe.
  • C.S. Wagner, J. Cave, L.A. Leydesdorff, V Allee, I. Graafland, R. Thomson & M. Venema (2004). Network analyses: Exploring payways among three hubs. ERAnets Technical Report TR-183-EC. (extern rapport). Leiden: RAND EUROPE.
  • C.S. Wagner, J. Cave, L.A. Leydesdorff, V Allee, I. Graafland, R. Thomson, M. Venema & M. Botterman (2004). ERAnets: Phase 1 Progress Report. Technical Report TR-178-EU. (extern rapport). Leiden: RAND Europe.
  • L.A. Leydesdorff (2004). Mathematical, biological, and computational explanations [Review of the book E. Fox Keller: Making Sense of Life: Explaning Biological Development Models, Metaphors, and Machines. Harvard University Press, Cambridge, Massachussets, 2002]. Heredity.
  • L.A. Leydesdorff (2004). Sturen met een dichtgeplakte voorruit: Duurzame ontwikkeling en technologische innovatie. EUForum, 3 (4), 28-29.
  • P. Zhou & L.A. Leydesdorff (2004). China's research outcome in nanotech takes the lead in the world in 2004. Science and Technology Daily.
  • L.A. Leydesdorff & J.R. Ward (2004). Communication of science shop mediation: A kaleidoscope of university-society relations, INTERACTS: Improving Interaction between NGOs, Universities, and Science Shops: Experiences and Expectations. Fifth RTD Framework Programme, The European Commission/DG 12. (extern rapport). Amsterdam: ASCoR.
  • R.N. Kostoff, J. Antionio del Rio, H.D. Cortes, C. Smith, A. Smith, C.S. Wagner, L.A. Leydesdorff, G. Karypis, G. Malpohl & R. Tshiteya (2004). Science and technology text mining: Mexico core competencies. Technical Report of the Defense Technical Information Center of the U.S. Office of Naval Research. (extern rapport). Amsterdam: ASCoR.

1994

  • L.A. Leydesdorff (1994). Wetenschap laat zich niet zomaar sturen. Zeno, 1, 12-15.

2015

  • P. Groenewegen, I. Hellsten & L. Leydesdorff (2015). Social networks as a looking glass on the social networks community. In Paper presented at the meeting of the International Sunbelt Social Network, Brighton, UK.
  • L. Leydesdorff (2015). How synergies in university-industry-government relations can shape innovation systems. Interview in: Theory Talk #68. http://www.theory-talks.org/2015/03/theory-talk-68.html (2015, March 11).
  • L. Leydesdorff & S. Milojević (2015). The citation impact of german sociology journals and the validity of scientometric evaluations. In Book of Abstracts: Meeting of the Society for the Social Studies of Science (4S). Denver, CO (pp. 134).
  • L. Leydesdorff, G. Heimeriks & D. Rotolo (2015). Journal portfolio analysis for countries, cities, and organizations: Maps and comparisons. In Paper presented at the Atlanta Conference on Science and Innovation Policy, Atlanta, GA. Book of Abstracts, p. 71.
  • L. Leydesdorff (2015). Evolutionary and institutional models of the triple helix of (i) novelty production, (ii) wealth generation, and (iii) normative control in innovation ecosystems. In Paper presented at the Conference of the World Complexity Science Academy, Amsterdam..
  • L. Leydesdorff, A.M. Petersen & I.A. Ivanova (2015). The generation and self-organization of meaning in the communication of information and redundancy. In G. Kaniadakis (Ed.), Paper presented at the International Electronic Conference on Entropy and Its Applications (ECEA-2); Section: Complex Systems. In Proceedings of the 2nd Int. Electron. Conf. Entropy Appl., Sciforum Electronic Conference Series, Vol. 2, 2015 , C005.
  • D.P. Lucio Arias, G. Velez-Cuartas & L. Leydesdorff (2015). SciELO citation index and web of science: Distinctions in the visibility of regional science. In A.A. Salah, A.A.A. Salah, C. Sugimoto & U. Al (Eds.), Paper presented at the International Conference of the International Society of Scientometrics and Informetrics (pp. 1152-1160). Istanbul, Turkey: Boğaziçi University.
  • L. Leydesdorff (2015). Mutual redundancies and triple contingencies among perspectives on horizons of meaning. In W. Hofkirchner (Ed.), Paper presented at ISIS Summit Vienna 2015 - The Information Society at the Crossroads. Vianna: SciForum.
  • L. Leydesdorff & P. Zhou (2015). An international comparison of the citation impact of chinese journals with priority funding. In A.A. Salah, A.A.A. Salah, C. Sugimoto & U. Al (Eds.), Paper presented at the International Conference of the International Society of Scientometrics and Informetrics (pp. 160-171). Istanbul, Turkey: Boğaziçi University.

2014

2013

  • L. Leydesdorff (2013). The different topologies of latent semantic analysis (LSA) and social network analysis (SNA), and their relevance for the generation of discursive knowledge. In Paper presented at the 23rd Sunbelt Conference of the International Network for Social Network Analysis, Hamburg, Germany. Abstracts Sunbelt XXXIII, http://hamburgsunbelt2013.files.wordpress.com/2013/05/abstracts.pdf (pp. 272-273).
  • L. Leydesdorff, I.A. Ivanova & Ø. Strand (2013). University-industry-government relations and the triple-helix indicator. In Paper presented at the Triple Helix International Conference, London.
  • E. Perevodchikov, A. Uvarov & L. Leydesdorff (2013). Measuring synergy in the Russian innovation systems. In Paper presented at the Triple Helix International Conference, London.
  • L. Leydesdorff (2013). Patents as an analytical lens on the triple helix of university-industry-government relations. In Paper presented at the workshop “Where is Applied Research Going?” Triple Helix International Conference, London.
  • J. Adams, K. Gurney, D. Hook & L. Leydesdorff (2013). Collaboration in Africa: Networks or clusters? In Paper presented at the International Society for Scientometrics and Informetrics Conference, Vienna.
  • D. Rotolo, I. Rafols, M. Hopkins & L. Leydesdorff (2013). Building a multi-perspective scientometric approach on tentative governance of emerging technologies. In Paper presented at the International Society for Scientometrics and Informetrics Conference, Vienna.
  • L. Leydesdorff, I. Rafols & C. Chen (2013). Interactive overlays of journals and the measurement of interdisciplinarity. In Paper presented at the International Society for Scientometrics and Informetrics Conference, Vienna.
  • L. Leydesdorff & I.A. Ivanova (2013). Mutual redundancies in interhuman communications: Steps towards a calculus of meaning processing. In Paper presented at the Annual Conference of the American Society for Cybernetics, Bolton, UK.
  • L. Leydesdorff, D. Kushnir & I. Rafols (2013). Overlay maps of patents based on IPC classes. In Paper presented at the Conference on Science and Technology Indicators, Berlin.
  • L.A. Leydesdorff, C. Chen, D. Kushnir & I. Rafols (2013). Patent mapping in geographic and cognitive dimensions: A lens to knowledge-based innovation policies. In Paper presented at the Biennial Atlanta Conference on Science and Innovation, Atlanta, GA..
  • D. Rotolo, I. Rafols, M. Hopkins & L. Leydesdorff (2013). Mapping the de facto governance of emerging science and technologies. In Paper presented at the Biennial Atlanta Conference on Science and Innovation, Atlanta, GA.
  • L. Leydesdorff & S.E. Baumgartner (2013). Group-based trajectory modeling of citations in scholarly literature: Dynamic qualities of "transient" and "sticky knowledge Claims". In Paper presented at the Global TechMining Conference, Atlanta, GA.
  • L. Leydesdorff (2013). In search of a sociological theory of innovation: Trajectories, regimes, and translations among perspectives. In Paper presented at the Amsterdam Workshop on Social Networks and Organizations: Theoretical Advances in Network Research, Free University, Amsterdam.
  • L. Leydesdorff, F. Radicchi, L. Bornmann, C. Castellano & W. de Nooy (2013). Field-normalization of impact factors: rescaling versus fractionally counted. In J. Gorraiz, E. Schiebel, C. Gumpenberger, M. Hörlesberger & H. Moed (Eds.), Proceedings of ISSI 2013 Vienna: 14th International Society of Scientometrics and Informetrics Conference: Vienna, Austria, 15th to 20th July 2013. - Vol. 1 (pp. 769-783). Vienna: Austrian Institute of Technology.

2012

  • L. Leydesdorff, D. Rotolo & I. Rafols (2012). Multiple scientometric perspectives on medical innovation: Using the Medical Subject Headings (MeSH) of PubMed in the case of "RNA interference". In Annual meeting of the Society for Social Studies of Science (4S) and the European Association for the Study of Science and Technology (EASST) (pp. 73). Copenhagen: Copenhagen Business School.
  • I. Rafols, L. Leydesdorff, A. O'Hare, P. Nightingale & A. Stirling (2012). How journal rankings can suppress interdisciplinary research. In Poster presented at the Science of Team Science conference 2012, Chicago, USA.
  • L. Leydesdorff & O. Strand (2012). Triple-helix relations and potential synergies among technologies, industries, and regions in Norway. In T. Durrani (Ed.), Emerging Triple Helix Models for Developing Countries (pp. 33). Bandung, Indonesia: 10th International Triple Helix conference.
  • L. Leydesdorff, D. Rotolo & I. Rafols (2012). Innovation as a nonlinear process and the bibliometric perspective. In ISI (Ed.), Towards Transformative Governance? Responses to mission-oriented innovation policy pradigms. Karlsruhe: Fraunhofer Institute for Systems and Innovation Research.
  • L. Leydesdorff, D. Rotolo & I. Rafols (2012). Bibliometric perspectives on medical innovation using the Medical Subject Headings (MeSH) of PubMed. In 2nd Global TechMining Conference. Montreal: 2nd Global TechMining Conference.
  • S. Milojević, C. Chen, B.M. Hemminger, L. Leydesdorff, J. Priem & S.B. Weingart (2012). Information visualization state of the art and future directions. In A. Grove (Ed.), Paper presented at the 75th ASIS&T Annual Meeting. Baltimore MD: ASIST 2012.
  • L. Leydesdorff & Ø. Strand (2012). Triple-helix relations and potential synergies among technologies, industries, and regions in Norway. In T. Durrani, J.H. Tjakraatmadja & W. Dhewanto (Eds.), 10th Triple Helix Conference 2012 Vol. 52. Procedia - Social and Behavioral Sciences (pp. 1-4). Amsterdam: Elsevier.
  • L. Leydesdorff, D. Rotolo & W. de Nooy (2012). Innovation as a Nonlinear Process and the Scientometric Perspective. In E. Archambault, Y. Gingras & V. Larivière (Eds.), Proceedings of the 17th International Conference on Science and Technology Indicators (pp. 530-540). Montréal: Science-Metrix and Ost.
  • L. Leydesdorff & U. Felt (2012). "Books" and "book chapters" in the Book Citation Index (BCI) and Science Citation Index (SCI, SoSCI, A&HCI). In A. Grove (Ed.), Information, interaction, innovation: celebrating the past, constructing the present and creating the future; 75th annual meeting ASIS&T 2012; October 26-30, Baltimore, Md. Proceedings. Silver Spring, Md.: ASIS&T.
  • I. Rafols, L. Leydesdorff, A. O'Hare, P. Nightingale & A. Stirling (2012). How journal rankings can suppress interdisciplinary research. In Workshop on “The Organisation, Economics and Policy of Scientific Research”, Turin.

2011

  • L. Leydesdorff (2011). Mapping the geography of science in terms of postal addresses versus specialties and disciplines. In Paper presented at the Workshop on the Geography of Science, Eindhoven Center for Innovation Studies, Technical University Eindhoven.
  • L. Leydesdorff & I. Rafols (2011). Indicators of the interdisciplinarity of journals: diversity, centrality, and citations. In Paper presented at the Symposium of the International Network of Interdisciplinarity and Transdisciplinarity, University Utrecht.
  • L. Leydesdorff (2011). Entropy methods. In Paper presented at the HSS11 Conference on the University College & Society, Aalesund.
  • G. Adamo, S. Allwinkle, A. Caragliu, I. Cooper, P. Cruickshank, M. Deakin, C. Del Bo, M. Janssen, G. Kuk & L. Leydesdorff (Eds.). (2011) Journal of Urban Technology, 18(Special Issue, Creating Smart-er Cities).
  • I. Rafols, L. Leydesdorff, A. O'Hare, P. Nightingale & A. Stirling (2011). How journal rankings can suppress interdisciplinarity: the case of innovation studies and business and management. In E. Noyons, P. Ngulube & J. Leta (Eds.), Proceedings of the ISSI 2011 Conference: 13th International Conference of the International Society for Scientometrics & Informetrics: Durban, South Africa (pp. 712-723). Leuven: ISSI.
  • I. Rafols, M. Hopkins & L. Leydesdorff (2011). Diffusion and network formation of emerging technologies: the case of RNA interference. In Paper presented at the Third Annual Conference of the Society for the Study of Nanoscience and Emerging Technologies (S.NET), Tempe AZ.
  • L. Leydesdorff & R.D. Shelton (2011). University patenting and funding incentives. In Paper presented at the 9th Intern. Conference on the Triple Helix of University-Industry-Government Relations, Stanford University.
  • L. Leydesdorff, B. Hammarfelt & A. Salah (2011). Journal citation maps for the Arts & Humanities Citation Index. In First Global Tech-mining Conference, Georgia Institute of Technology, Atlanta, GA.
  • L. Leydesdorff (2011). Comparison of the Integrated Citation Impacts of Journals, Nations, and Institutions in the set journals of "Nanoscience & Nanotechnology". In Paper presented at the Atlanta Conference on Science & Innovation Policy, Georgia Institute of Technology, Atlanta GA.
  • L. Leydesdorff (2011). New developments in citation analysis: Integrated impact indicators. In Paper presented at the Annual Meeting of the Society for the Social Studies of Science, Cleveland, OH.
  • L. Leydesdorff & I. Rafols (2011). Interactive overlays: a new method for generating global journal maps from web-of-science data. In Paper presented at the Annual Meeting of the Society for the Social Studies of Science, Cleveland, OH.
  • L. Leydesdorff & L. Bornmann (2011). Fractionally counted versus integer-counted impact factors in the ISI journal set 2008. In E. Noyons, P. Ngulube & J. Leta (Eds.), Proceedings of the ISSI 2011 Conference: 13th International Conference of the International Society for Scientometrics & Informetrics: Durban, South Africa (pp. 442-453). Leuven: ISSI.

2010

  • L. Leydesdorff (2010, December 17). Michel CALLON’s research under the prism of scientometric analysis. Paris, Invited lecture: Paper presented at the Conference in Honour of Michel Callon’s 65th Birthday, École Nationale Supérieure des Mines.
  • L. Leydesdorff (2010, December 4). First Conference of the World Complexity Science Academy on "Complexity Systemic Sciences and the Key Global Challenges of Our Times". Bologna, Invited commentator.
  • L. Leydesdorff (2010, December 2). The Triple Helix of University-Industry-Government Relations. Pescara, Invited Lecture - University of Chieti-Pescara.
  • L. Leydesdorff (2010, October 26). Scientometric indicators and the operationalization of variables in science and technology studies. Gent, Invited Keynote: Colloquium “Academic Practice in the 21th Century, Centre For R&D Monitoring (ECOOM), Gent.
  • L. Leydesdorff (2010, November 2). How emerging technologies conquer the world: diffusion, differentiation, and transformation into research technologies. Utrecht, Colloquium of the Department of Innovation Studies, Utrecht University.
  • I Rafols, A. Porter & L. Leydesdorff (2010, October 22). Indicateurs pour "ouvrir" le débat. Le cas de l’interdisciplinarité, Ministère de l’Enseignement supérieur et de la Recherche. Observatoire des Sciences et des Techniques (OST), Invited keynote address: Colloquium for the occasion of ‘Les 20 ans de l’OST’.
  • L. Leydesdorff (2010, October 20). Regional Retention versus Global Competition in a Triple Helix Model: Can Evolutionary Theorizing Inform the Institutional Arrangements. Madrid, Keynote address to the International Conference on University, Industry, and Government Linkages, Triple Helix VIII, La Salle University.
  • L. Leydesdorff (2010, June 21). The Structuration of Expectations: Constructing a Knowledge-based Order. Rotterdam, Colloquium van de onderzoeksgroepen Governance of Complex Systems en DRIFT, Bestuurskunde, Erasmus Universiteit.
  • L. Leydesdorff (2010, June 4). Bibliométrie - Pajek - Web of Science. Paris, Invited teacher: Journée de l’Atelier, École des Hautes Études en Sciences Sociales (EHESS),.
  • L. Leydesdorff (2010, June 3). Knowledge-Based Systems, Networks of Texts and Authors, and Codification. Paris, Invited Keynote: EHESS - Laboratoire de démographie et d’histoire sociale (LaDéHiS) and INED - Service Méthodes Statistiques (SMS) “Networks of scientific collaborations.
  • L. Leydesdorff (2010, April 17). Roundtable about "Niklas Luhmann and Social Theory". Montreal, Roundtable, Department of Sociology, McGill University.
  • L. Leydesdorff (2010, April 16). Giddens’ "Structuration," Luhmann’s "Self-organization," and the Operationalization of the Dynamics of Meaning. Montreal, Paper presented at the Workshop “Social Systems Theory and Europe”, Seventh International Conference of the Council for European Studies, Montreal.
  • L. Leydesdorff (2010, April 2). Journal Citation Analysis and the Baseline Problem of Evolving Networks of Scientific Communication. Seoul, Paper presented at a visit to the Seoul National University.
  • L. Leydesdorff (2010, March 31). The Triple Helix Indicator of University-Industry-Government Relations. Seoul, Paper presented at a visit to the Seoul National University.
  • L. Leydesdorff (). The sociology of scientific knowledge production. Seoul, Paper presented at a visit to the Seoul National University.
  • L. Leydesdorff (2010). "The Emergence of Nanotechnology", Places & Spaces: Mapping Science Exhibit. In Royal Society Global Science Report Launch Conference, Kavli Royal Society International Center,. London.
  • L. Leydesdorff & I Rafols (2010). How emerging technologies conquer the world: diffusion, differentiation, and transformation into research technologies. In Paper presented at the International Conference on "Tentative Governance in Emerging Science and Technology, University of Twente. Enschede.
  • M. Daekin & L. Leydesdorff (2010). The Triple Helix and the Evolution of Smart Cities under the Cultural Reconstruction and Governance of the Urban Renaissance. In Paper presented at the International Conference on University, Industry, and Government Linkages, Triple Helix VIII, La Salle University, Madrid. Madrid.
  • L. Leydesdorff & I Rafols (2010). How do Emerging Technologies Conquer the World: Patterns of Diffusion of Research Technologies. In Paper presented at the Workshop "Modeling Knowledge Dynamics," Virtual Knowledge Studio, Netherlands Royal Academy of Arts and Sciences, Amsterdam. Amsterdam.
  • I Rafols & L. Leydesdorff (2010). Analyzing SPRU’s research capabilities. A mixed survey-bibliomtric method for mapping interdisciplinary organizations. In Paper presented at the 11th Intern. Conference on Science and Technology Indicators "Creating Value for Users", Leiden University (pp. 177). Leiden.
  • L. Bornmann, F. de Moya-Anegon & L. Leydesdorff (2010). Does scientific advancement lean on the shoulders of mediocre research? An investigation of the Ortega hypothesis. In Paper presented at the 11th Intern. Conference on Science and Technology Indicators "Creating Value for Users", Leiden University (pp. 177). Leiden.
  • I Rafols, A. Porter & L. Leydesdorff (2010). Visualisation of knowledge domains in interdisciplinary research organizations. In Paper presented at a workshop of the Udo Keller Stiftung Forum Humanum, Hamburg, Germany. Hamburg.
  • L. Leydesdorff & I Rafols (2010). Indicators of the Interdisciplinarity of Journals: Diversity, Centrality, and Citations. In Paper presented at the 11th Intern. Conference on Science and Technology Indicators "Creating Value for Users", Leiden University. Leiden.
  • L. Leydesdorff & I Rafols (2010). How emerging technologies conquer the world: diffusion, differentiation, and transformation into research technologies. In Annual Meeting of the Society for the Social Studies of Science, University of Tokyo. Tokyo.
  • L. Leydesdorff (2010). Semiosis and the Communication of Meaning in Social Networks. In Annual Meeting of the International Networks for Social Network Analysis, Sunbelt XXX, Riva di Garda. Riva di Garda.
  • L. Leydesdorff (2010). Husserl’s Cogitata and the Simulation of Double Contingencies in Interhuman Interactions. In Paper presented at the Workshop "Integrating Cultures: Models, Simulations and Applications, Lorentz Center, Leiden. Leiden.
  • L. Leydesdorff & A. Salah (2010). Journal Mapping in the Humanities on the basis of Arts & Humanities Citation Index. In Paper presented at the 3rd European Network of Indicators Designers Conference, Paris,. Paris.
  • I Rafols, A. Porter & L. Leydesdorff (2010). The use of global maps of science in management and policy contexts. In Paper presented at the 3rd European Network of Indicators Designers Conference, Paris. Paris.

2009

  • I. Rafols & L. Leydesdorff (2009). Content-based and algorithmic classifications of journals: perspectives on the dynamics of scientific communication and indexer effects. In B. Larsen & J. Leta (Eds.), Proceedings of ISSI 2009: 12th International Conference on Scientometrics and Informetrics ISS, Rio de Janeiro, 16 July 2009 (pp. 460-471).
  • L. Leydesdorff & A. Scharnhorst (2009). The Configuration and Structuration of Knowledge Networks: Differentiation and Integration of Relations, Positions, and Functions. In Workshop on "Structure and Dynamics of Knowledge Networks", Eindhoven University of Technology, Eindhoven, 12th-14th May 2009.
  • L. Leydesdorff (2009). How are new citation-based journal indicators adding to the bibliometric toolbox? In B. Larsen & J. Leta (Eds.), Proceedings of ISSI 2009: 12th International Conference on Scientometrics and Informetrics ISSI, Rio de Janeiro, 15 July 2009 (pp. 108-119).
  • L. Leydesdorff (2009). The Evolution and Codification of Knowledge Networks in terms of Relations, Positions, and Functions. In 9th International Conference of Sociocybernetics ‘Modernity 2.0’: Emerging Social Media Technologies and Their Impacts, Urbino, 30 June 2009.
  • L. Leydesdorff & C. Probst (2009). Communication Studies as an interdisciplinary field of science: its delineation in terms of scientific journals. In Pre-conference workshop on ‘interdisciplinarity’, 12th International Conference on Scientometrics and Informetrics ISSI, Rio de Janeiro, 13 July 2009.
  • L. Leydesdorff (2009). Making Your Own Science Maps. In Pre-conference workshop on ‘Using Maps of Science to Teach Science’, 12th International Conference on Scientometrics and Informetrics ISSI, Rio de Janeiro, 13 July 2009.
  • L. Leydesdorff (2009). The Measurement of Anticipation in Networked Systems. In 9th International Conference on Computing Anticipatory Systems CASYS’09, Liège, Belgium, 6 August 2009.
  • L. Leydesdorff & W. de Nooy (2009). How can configurations be studied in two-mode networks? Higher-order structure in social networks. In Conference on 2-Mode Social Network Analysis, Free University, Amsterdam, 2 October 2009.
  • L. Leydesdorff (2009). Animations on the Basis of Quantitative Applications of Actor-Network Theory ANT. In . Annual Meeting of the Society for the Social Studies of Science (4S), Washington DC, 29 November 2009.
  • L. Leydesdorff & D. Lucio-Arias (2009). The Dynamics of Exchanges and References among Scientific Texts, and the Self-Organization of Discursive Knowledge. In Annual Meeting of the Society for the Social Studies of Science (4S), Washington DC, 29 November 2009.
  • L. Leydesdorff, A. Porter & I Rafols (2009). Using global maps of science in policy and management. In Atlanta Science Policy Conference. Atlanta, 2-3 October 2009.
  • D. Lucio-Arias & L. Leydesdorff (2009). Configurational Information and Discursive Knowledge in Scientific Specialties. In Paper presented at the 5th International Conference on Webometrics, Informetrics, and Scientometrics & Tenth COLLNET Meeting, Dalian, China.
  • L. Leydesdorff (2009, March 2). The Knowledge-based Economy and a Triple Helix of university-industry-government relations. Napier University, Edinburgh, Invited lecture at “Creating Smarter Cities”.
  • L. Leydesdorff (2009, March 18). The Triple Helix of university-industry-government relations: (neo)institutional and (neo)evolutionary perspectives. Newcastle Business School, invited lecture at the research group of university-industry-government relations.
  • L. Leydesdorff & C. Probst (2009, May 27). Communication Studies as an interdisciplinary field of science: its delineation in terms of scientific journals. Faculty of Communication Sciences, Università della Svizzera Italiana, Lugano, EpiDay: First USI-Com Young Scholars Research Day.
  • L. Leydesdorff (2009, May 28). The Measurement of the Knowledge Base of an Economy and university-industry-government relations. Università della Svizzera Italiana, Lugano, Invited Lecture, Faculty of Communication Sciences.
  • L. Leydesdorff (2009, May 29). Round table contribution to the OECD Regional Innovation Review of Piedmont. Turin, Round table contribution.
  • L. Leydesdorff (2009, June 19). The Triple Helix Indicator of University-Industry-Government Relations. Glasgow, Keynote address to the 8th International Conference of the Triple Helix of University-Industry-Government Relations.
  • L. Leydesdorff (2009, September 4). Scientometric indicators and the operationalization of variables in science and technology studies. Social and Behavioural Sciences Community, League of European Research Universities, Amsterdam, invited lecture.
  • L. Leydesdorff & S. Yuan (2009, September 10). Scientific co-authorship networks in national and international contexts. Catania/Padua: CLEUP, (keynote address), 7th Meeting of the Classification and Data Analysis Group (CLADAG) of the Italian Statistical Society (SIS); Salvatore Ingrassia and Roberto Ricci (Eds.), pp. 165-168.
  • L. Leydesdorff (2009, October 7). "Structuration" and Intellectual Organization in the Sciences. Virtual Knowledge Studio and Rathenau Institute, Amsterdam, (invited lecture), Workshop Modeling Science – Understanding, forecasting, and communicating the science system.

2008

2003

  • L.A. Leydesdorff (). Anticipatory systems and the processing of meaning: A simulation study using Luhmann's theory of social systems. Groningen, Conference of the European Social Simulation Association ESSA/SimSoc VI.
  • L.A. Leydesdorff (). Translations at interfaces in Triple Helix configurations: Mapping the case of 'Stem Cell' research. Beijing, International Conference on Scientometrics and Informatrics ISSI.
  • L.A. Leydesdorff (2003, August 29). The mutual information as an indicator of complexity and self-organization in relational systems. Beijing, COLLNET Workshop on "Collaboration in Science and Technology".
  • L.A. Leydesdorff (). Anticipation in social systems. Liège, 6th International Conference on Computing Anticipatory Systems, CASYS'03.
  • L.A. Leydesdorff (). The opening of systems theory: Report of the Luhmann Workshop at the Copenhagen Business School. Copenhagen, Conference The Opening of Systems Theory.
  • L.A. Leydesdorff (). The construction and globalization of knowledge bases innovation systems. Copenhagen, Conference The Opening of Systems Theory.
  • L.A. Leydesdorff (). The Triple Helix of University-Industry-Government Relations: A Neo-Evolutionary Model of Innovations. St. John's Canada, Conference on the Knowledge-based Economy and Regional Economic Development, Memorial University of Newfoundland.
  • L.A. Leydesdorff (). The Knowledge Base of an Economy: What is it? Can it be measured? Can it be modeled? Maastricht, Annual Meeting of the European Association for Political and Evolutionary Economics EAEPE. The Information Society: Understanding its Institutions Interdisciplinarily.
  • L.A. Leydesdorff (). Measuring and Modeling the Knowledge Base of Innovations. Beijing, 9th International Conference on Scientometrics and Informetrics by the International Society for Scientometrics and Informetrics ISSI.
  • L.A. Leydesdorff (). Communication and Knowledge: How is the Knowledge base of an Economy Constructed. Aix-en-Provence, 15th Annual Meeting on Socio-Economics by the Society for Scientometrics and Informetrics, by the Society for the Advancement of Socio-Economics SASE.
  • L.A. Leydesdorff (). The measurement and mapping of codification in scientific, medical, economic and political contexts. Nijmegen, Etmaal van de Communicatiewetenschap.
  • L.A. Leydesdorff (). How is meaning codified in networks of words representing 'Stem-Cell' research, it's application and relevant policy debates. Atlanta, GA, Society for the Social Studies of Science 4S.
  • L.A. Leydesdorff (2003). Network of Excellence PRIME. Coordinator: Liège.
  • L.A. Leydesdorff (2003). Computing Anticipatory Systems, CASYS'03. Member of the International Programm Committee: Liège (2003, August 11 - 2003, August 16).
  • L.A. Leydesdorff (2003). Meeting Program Committee Current Research Information Systems. meeting: Brussels (2003, April 28).
  • L.A. Leydesdorff (2003). Dynamics of the Informational Interface. Workshop: Toronto (2003, May 2 - 2003, May 5).
  • L.A. Leydesdorff (2003). Co-convenor of the 5th International Conference of the Triple-Helix of university-industry-government relations.
  • L.A. Leydesdorff (2003). Colloquium Science & Technology Dynamics.
  • L.A. Leydesdorff (2003, September 1). The knowledge base of innovation systems and the study of science, technology and innovation. Beijing, Institute for Scientific and Technical Information of China, ISTIC.
  • L.A. Leydesdorff (2003, September 1). The knowledge base of an economy as a subject of science, technology, and innovation studies. Beijing, Tsinguah University.
  • L.A. Leydesdorff & C.S. Wagner (2003, August 29). Mapping global science using international Co-authorships: A comparison of 1990 amd 2000. Beijing, COLLNET Workshop on "Collaboration in Science and Technology".

2002

  • L.A. Leydesdorff (). Aggregated journal-journal citations as indicators of change in the social sciences. York, Annual Meeting of the European Association for the Study of Science & Technology.
  • L.A. Leydesdorff (). Knowledge-based transformations of University-Industry-Government Relations: Can Luhmann's sociology be operationalized? Munich, International Symposium on 'Niklas Luhmann and Organization Theory', EGOS.
  • L.A. Leydesdorff (). Knowledge-based transformations of University-Industry-Government Relations. University of Singapore, International Workshop on Science, Technology and Society: Lessons and Challenges, Dept. of Sociology.
  • L.A. Leydesdorff (). Indicators of innovation in a knowledge-based economy. Universiteit Utrecht, Colloquium Vakgroep Natuurwetenschappen & Innovatiemanagement.
  • L.A. Leydesdorff (2003, February 15). Understanding Society as an information and communication technology. Lincoln, UK, Invited speech to the Spring Seminar.
  • L.A. Leydesdorff (). Indicators of the globalization of communication. Zürich, Workshop on the Internet for Research and Development.
  • L.A. Leydesdorff (). The measurement and evaluation of complexity and self-organization in Triple Helix Relations among Universities, Industries and Governments. Copenhagen, Fourth Triple Helix Conference.
  • L.A. Leydesdorff (). Can the 'knowledge-base' of an economy be measured? Copenhagen, Fourth Triple Helix Conference.
  • L.A. Leydesdorff (). The self-organisation of a knowledge-based society: Regime changes and sustainable development. Wageningen, Complex Dynamics In and Between Social and Eco Systems, Studium Generale.
  • L.A. Leydesdorff & A. Scharnhorst (). Scientometric indicators and the evaluation of research in the Internet Age - consequences for national science policy strategies. Berlin, Workshop of the Förderinitiative "Science Policy Studies", Brandenburgische Akademie der Wissenschaften.
  • L.A. Leydesdorff (2003, January 18). Knowledge-based Innovation Systems and a Triple Helix of University-Industry-Government Relations. Strassbourg, Invited lecture.

2001

  • L.A. Leydesdorff (2001). Knowledge-based innovation systems and the model of a triple helix of university-industry-government relations. Paper presented at the conference of the Society for the Advancement of Socio-Economics.: Amsterdam (2001, June 28 - 2001, June 30).
  • L.A. Leydesdorff (2001). The self-organisation of the knowledge-based society. Paper presented at the conference 'WS Epiphany'.: Brussels.
  • L.A. Leydesdorff (2001). An emerging triple helix of university-industry-government relations. Paper presented at the conference 'Naeringslivdagene: Netverk som strategi for naeringsutvikling'.: Trømso, Norway (2001, March 21 - 2001, March 22).
  • L.A. Leydesdorff (2001). Fifth international conference 'Computing Anticipatory Systems'. Organization of scientific meetings.: Liège, Belgium (2001, August 13 - 2001, August 18).
  • L.A. Leydesdorff (2001). Mapping university-industry-government relations on the internet: The construction of indicators for a knowledge-based economy. Address at scientific meetings: Rio de Janeiro, Brazil (2000, April 26 - 2000, April 29).
  • L.A. Leydesdorff (2001). The complex interaction between knowledge production, policy, and knowledge use. Address at scientific meetings: Amsterdam (2000, February 21 - 2000, February 22).
  • L.A. Leydesdorff (2001). A methodological perspective on the evaluation of university-industry-government relations. Address at scientific meetings: Nottingham (2000, September 18 - 2000, September 19).
  • L.A. Leydesdorff (2001). A model engine for the simulation of 'lock-in', 'break-out', and the dissemination of technological culture. Address at scientific meetings: Toronto.
  • L.A. Leydesdorff (2001). Indicators of innovation in a knowledge-based economy. Address at scientific meetings: Leiden.
  • L.A. Leydesdorff (2001). De complexe dynamica van wetenschappelijke communicatie. Paper presented at the second Vlaams-Nederlands Congres voor Algemene en speciale Wetenschapsfilosofie conference.: Amersfoort (2001, May 18 - 2001, May 20).
  • L.A. Leydesdorff (2001). The appreciation of models of complex dynamics in the case of technological innovation. Paper presented NOSMO meeting 'Methodologendag'.: Amsterdam.
  • L.A. Leydesdorff (2001). The communicative turn in social systems theory. Paper presented at the conference 'Fictions of dialogue: Interdisciplinary approaches.: Edinburgh (2001, November 22 - 2001, November 25).
  • L.A. Leydesdorff (2001). Technology and culture: The dissemination and the potential 'lock-in' of new technologies. Paper presented at the Society for the Social Study of Science conference.: Boston, MA (2001, October 31 - 2001, November 4).
  • L.A. Leydesdorff (2001). The integration and differentiation of information processing in social systems. Paper presented at the second conference 'Semiosis, evolution and energy'.: (2001, October 5 - 2001, October 8).
  • L.A. Leydesdorff (2001). The self-organization of the knowledge-based society. Paper presented at the ISCE seminar 'Practices of Meaning'.: Utrecht (2001, September 24 - 2001, September 25).
  • L.A. Leydesdorff (2001). Knowledge-based information systems and the model of a triple helix of university-industry-government relations. Paper presented at the conference 'New economic windows: New paradigms for the new millennium'.: Salerno, Italy (2001, September 13 - 2001, September 15).
  • L.A. Leydesdorff (2001). Appreciative theorizing and formal modeling of complex systems. Paper presented at the fifth international conference 'Computing anticipatory systems'.: Liège (2001, August 13 - 2001, August 18).

Prijs

  • L. Leydesdorff (2011). Visiting Professorship. Visiting Professorship at the Institute of Scientific and Technical Information of China: Beijing (2011, June 7). Recognition.
  • L. Leydesdorff (2011). Best paper award. William Page Award, Conference on Science & Innovation Policy: Atlanta. Recognition.
  • L. Leydesdorff (2011). Honorary Fellow. Honorary Fellow in SPRU - Science and Technology Policy Research, University of Sussex: (2011, January 26). Recognition.

Wetenschappelijke positie

  • L. Leydesdorff (period: 2012 till 2012). Visions for Horizons 2020, Copenhagen Research Forum [vice-chair Social Sciences].Functie bij: Technical University of Denmark.
  • L. Leydesdorff (period: 2012 till 2012). Recommendations for an optimised implementation of Horizon 2020, Copenhagen Research Forum II [vice-chair Social Sciences].Functie bij: Technical University of Denmark.
  • L. Leydesdorff (period: 2012 till 2012). Vice-President of the Social Science CommitteeFunctie bij: the Copenhagen Research Forum (Danish Presidency of the EU).

Andere

  • L. Leydesdorff (2012). Organiser. 10th International Triple Helix conference: Bandung, Indonesia (2012, August 8 - 2012, August 10).

Spreker

  • L. Leydesdorff (2015, August 21). The triple helix of (i) novelty production, (ii) wealth generation, and (iii) normative control: A neo-evolutionary model of innovation systems. Tsinghua University, Beijing, Keynote at the Triple Helix Conference: Academic-Industry-Government Triple Helix Model for fast-developing countries.
  • L. Leydesdorff (2015, June 30). The triple helix of knowledge production, wealth generation, and normative control: A neo-evolutionary model of innovation ecosystems. Boğaziçi University, Istanbul, Turkey, Keynote at the Iternational Conference at the International Society of Scientometrics and Infometrics.
  • L. Leydesdorff (2015, December 16). In search of a network theory of innovation: How to combine Luhmann’s systems theory with Latour’s Actor network theory? Bad Neuenahr-Ahrweiler, Germany, Keynote at European Academy of Technology and Innovation Assessment.
  • L. Leydesdorff (2014, March 14). Patent mapping in geographic and cognitive dimensions: A lens to knowledge-based innovation policies. Washington DC, USA, Invited lecture at the Workshop "Analyzing Policy Impacts on Biotechnology Innovation Using Patent Data".
  • L. Leydesdorff (2014, May 12). The European Union, China, and the United States in the top-1% and top-10% layers of most-frequently-cited publications: Competition and collaborations. London, UK, Invited lecture at Birkbeck, University of London.
  • L. Leydesdorff (2014, May 29). The Triple Helix of innovations: Neo-institutional and neo-evolutionary models for explaining the presence or absence of systemness at regional and national levels. Lucca, Italy, Invited lecture at the Institute for Management and Technology.
  • L. Leydesdorff (2014, June 27). Relations, positions, and perspectives: In search of a network theory of innovations. St. Petersburg, Russia, Keynote lecture at the NetGlow '14 Conference, St. Petersburg, Russia.
  • L. Leydesdorff, I. Rafols & C. Chen (2013, November 11). Interactive overlays of journals and the measurement of interdisciplinarity. unknown, Invited lecture at the National Library of the Chinese Academy of Science, Beijing.
  • L. Leydesdorff (2013, November 8). The triple-helix indicator of synergy in innovation systems. unknown, Keynote at the International Conference on Scientometrics and University Evaluation, Ningbo.
  • L. Leydesdorff (2013, November 11). The triple helix of university-industry-government relations. unknown, Invited lecture at the Institute for Scientific and Technical Information of China, Beijing.
  • L. Leydesdorff (2013, January 17). The triple helix as an evolutionary model of national and regional innovation systems. unknown, Invited lecture at the Instituto the Gestión de la Innovación y del Conocimiento, Ingenio, Valencia.
  • L. Leydesdorff (2013, February 21). The triple helix as an evolutionary model of national and regional innovation systems. unknown, Invited lecture at the Università degli Studi di Napoli, Frederico II, Naples.
  • L. Leydesdorff (2013, March 27). The past, Present, and future of the triple helix model. unknown, Invited lecture at the YeungNam University, Department of Media & Communication, Daegu, Korea.
  • L. Leydesdorff (2013, March 30). The triple helix of university-industry-government relations: Neo-institutional and neo-evolutionary models of knowledge based innovation systems. unknown, Keynote at the 4th International Conference of SKIE: “Knowledge, Innovation, & Education, Seoul National University, Seoul.
  • L. Leydesdorff (2013, April 19). Patents as an analytical lens on the triple helix of university-industry-government relations. unknown, Invited lecture at the workshop on Intellectual property and university entrepreneurship, Birkbeck University, London.
  • L. Leydesdorff (2013, June 4). Scientometric instruments for analyzing the knowledge-based economy. unknown, Invited lecture at the European University, St. Petersburg, Russia.
  • L. Leydesdorff (2013, June 5). International co-authorship relations in the (social) science citation index: Is internationalization leading the network? unknown, Invited lecture at the European University, St. Petersburg, Russia.
  • L. Leydesdorff (2013, July 7). The triple helix as an evolutionary model of (national or regional) innovation systems. unknown, Keynote at the Master Class of the International Triple Helix Association, Oxford and Cambridge Club, London.
  • L. Leydesdorff (2013, July 8). The triple helix indicator. unknown, Invited lecture at the Triple Helix International Conference, London.
  • L. Leydesdorff (2013, August 27). The triple helix of university-industry-government relations as an evolutionary model of (e.g., regional) innovation systems. unknown, Invited lecture at the Master Class Measuring & Modelling Dynamics in Innovation Systems, Universiteit Utrecht, Utrecht.
  • L. Leydesdorff, F. Alkemade, G. Heimeriks & R Hoekstra (2013, October 17). Patent mapping in geographic and cognitive dimensions: A lens to knowledge-based innovation policies. unknown, Colloquium e-Humanities, Royal Academy of Arts and Sciences, Amsterdam.
  • L. Leydesdorff, I. Rafols & C. Chen (2013, November 6). Interactive overlays of journals and the measurement of interdisciplinarity. unknown, Invited lecture at the Zhejiang University, Hangzhou.
  • L. Leydesdorff (2013, November 5). The triple helix of university-industry-government relations. unknown, Invited lecture at Zhejiang University, Hangzhou.
  • L. Leydesdorff (2013, November 4). The triple helix of university-industry-government relations. unknown, Invited lecture at Nanjing University, Nanjing.
  • L. Leydesdorff (2012, July 9). Advances in science visualization: social networks, semantic maps, and discursive knowledge. London, Invited lecture at Conference on Text Mining, London School of Economics.
  • L. Leydesdorff (2012, July 23). Novel indicators of research impact and policy implications. Bethesda DC, USA, Portfolio Analysis Symposium, National Institute of Health.
  • L. Leydesdorff (2012, May 21). The triple helix as an evolutionary model of (national) innovation systems. Vienna, Invited lecture at Austrian Institute of Technology.
  • L. Leydesdorff (2012, June 4). The triple helix as an evolutionary model of (national) innovation systems. Grenoble, Invited lecture at ManETEI summer school on technology dynamics, Grenoble Ecole de Management.
  • L. Leydesdorff (). (2012). The communication of meaning and information, and the structuration of expectations as discursive knowledge: III. Scientific communication and cognitive codification. unknown, Semiotic Institute Online.
  • L. Leydesdorff (). (2012). Science & Technology Studies (STS), Luhmann's social systems theory, and the scientometric operationalization. Vienna, Series of guest lectures at the University of Vienna.
  • L. Leydesdorff (). (2012). The communication of meaning and information, and the structuration of expectations as discursive knowledge: I. Introduction. unknown, Semiotic Institute Online.
  • L. Leydesdorff (). (2012). The communication of meaning and information, and the structuration of expectations as discursive knowledge: II. "Meaning" as a sociological concept. unknown, Semiotic Institute Online.
  • L. Leydesdorff (2011, March 31). Communication of information, meaning, and knowledge. Dublin, Colloquium “Complex Systems and Computational Social Science, University College of Dublin.
  • L. Leydesdorff (2011, May 4). The past, present and future of the triple helix model. Aalesund, HSS11 Conference on the University College & Society, Aalesund.
  • L. Leydesdorff (2011, June 7). Analysis of a knowledge-based economy in terms of a triple helix of university-industry-government relations. Beijing, Conference of the International Council for Scientific and Technical Information (ICSTI), “Upgrading Information to Knowledge”.
  • L. Leydesdorff (2011, June 8). New developments in citation analysis: Percentile ranks instead of averages. Beijing, Institute for Scientific and Technical Information of China (ISTIC).
  • L. Leydesdorff (2011, June 9). The mapping of publication patterns - geographically and in terms of disciplines. Beijing, Library of the Chinese Academy of Science (LCAS).
  • L. Leydesdorff (2011, June 9). The geography of science in terms of both postal addresses and disciplines. Beijing, School of Public Policy and Management, Tsinghua University, Beijing.
  • L. Leydesdorff (). (2011). Communication in scholarly discourse: social, semantic, and epistemic networks. Naples, ARS 2011: Third International Workshop on Social Network Analysis - Collaboration Networks and Knowledge Diffusion: Theory; Data and Methods, June 23-25, 2011.
  • L. Leydesdorff (2011, July 12). The triple helix: From institutional relations to competing subdynamics. unknown, Conference on the Triple Helix of University-Industry-Government Relations, Opening Session, Stanford University.
  • L. Leydesdorff (2012, August 11). Hyperincursive cogitata and incursive cogitantes: scholarly discourse as a strongly anticipatory system. Liége, Belgium, Invited paper at the 10th Intern. Conference on Computing Anticipatory Systems CASYS 2011.
  • L. Leydesdorff (2011, August 10). The geography of science in terms of both postal addresses and disciplines. Bloomington, IN, InfoVis Laboratory.
  • L. Leydesdorff (). (2011). New developments in citation analysis: percentile ranks instead of averages? Bloomington, IN, Workshop on “Science Metrics, Classifications, and Mapping Standards”, August 11-12, 2011.
  • L. Leydesdorff (2011, August 16). Standards for science metrics, classifications, and mapping. Bloomington, IN, School of Library and Information Science.
  • L. Leydesdorff (2011, November 2). Triple helix models: neo-institutional and neo-evolutionary. Antwerpen, Lezingenreeks “Innovatie,” Universiteit Antwerpen.
  • L. Leydesdorff (). (2011). Integration and differentiation in collaborative and competitive relations among, between, and within universities, industry, and government. London, The Commercialisation of University Research Workshop, Birkbeck Centre for Innovation Management, Birkbeck University of London, October 23-24, 2011.
  • L. Leydesdorff (2011, March 4). The triple helix perspective of innovation systems. Sussex, SPRU, Science & Technology Policy Research, University of Sussex.
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