Ton van Raan
Professor emeritus Quantitative science studies
- Name
- Prof.dr. A.F.J. van Raan
- Telephone
- +31 71 527 2727
- vanraan@cwts.leidenuniv.nl
- ORCID iD
- 0000-0001-8980-5937
Emeritus professor of Quantitative Studies of Science. Ton's research focuses on the application of bibliometric indicators in research evaluation, science as a self-organizing complex system, statistics of bibliometric indicators, ranking and benchmarking of universities, and mapping of science.
Ton (A.F.J.) van Raan is emeritus professor of Quantitative Studies of Science. Founder and until 2010 Director of the Centre for Science and Technology Studies (CWTS), Leiden University, Netherlands. After his retirement as CWTS Director, he remained research professor. He studied mathematics, physics and astronomy at Utrecht University. PhD in Physics, Utrecht. Post-doctoral fellow at the University of Bielefeld (Germany), visiting scientist in the US, UK, and France. Work in atomic and molecular physics, laser-physics and astrophysics. From 1977 senior research fellow physics in Leiden, in 1985 'field switch' to science and technology studies, 1991 Professor. Research focus: application of bibliometric indicators in research evaluation; science as self-organizing complex system, statistics of bibliometric indicators, ranking and benchmarking of universities, mapping of science. In 1995 he received, together with the American sociologist Robert K. Merton, the Derek de Solla Price Award, the highest international award in the field of quantitative studies of science. He published (as author and co-author) around thirty articles in physics and two hundred in science and technology studies. Prof. van Raan set up a small company Science Consult for advice on research evaluation and science policy issues. On the occasion of his retirement as CWTS director he was awarded by the Queen of the Netherlands with the royal distinction of Knight in the Order of the Dutch Lion. For further information see www.cwts.nl/tvr/.
Current projects
- Sleeping Beauties in Science
A ‘Sleeping Beauty in Science’ is a publication that goes unnoticed (‘sleeps’) for a long time and then, almost suddenly, attracts a lot of attention (‘is awakened by a prince’). We developed a fast algorithm to detect in the Web of Science from 1980 until now publications that are not or hardly cited in, for instance, 10 years, and then suddenly become highly cited. We find that roughly half of the Sleeping Beauties in physics, chemistry, engineering and computer science are application-oriented and thus are potential sleeping inventions. Sleeping Beauties can also be cited in patents. In this way we make the link between the Sleeping Beauties and technological developments and thus we explore the existence of a 'dormitory of inventions'.
- Scaling phenomena in science and urban systems
Important socioeconomic city characteristics such as wealth and innovation capacity exhibit a nonlinear, power law scaling with population size. These findings mean that the larger the city, the more disproportionally they are places of wealth and innovation. Local properties of cities cause a deviation from the expected behavior as predicted by the power law scaling. Also universities show a similar behavior as cities in the distribution of the ‘gross university income’ (in terms of total number of citations) over ‘size’ (in terms of total number of publications). Moreover, the power law exponents for university scaling are comparable to those for urban scaling. Currently we are involved in a project on the relations between spatial scale and governance. This project is supported by the provincial government of South-Holland. You can find here the interim-report Onderzoek Ruimtelijke schaal en synergie in de Zuid-Hollandse netwerkeconomie and here the (draft) paper Urban Scaling and Its Relation with Governance Structures and Future Prospects of Cities.
Professor emeritus Quantitative science studies
- Faculteit der Sociale Wetenschappen
- CWTS
- Raan A.F.J. van (9 January 2008), A brief guide to bibliometrics. HEFCE Consultation Event Research Excellence Framework. London. [lecture].
- Raan A.F.J. van (16 May 2008), Assessment of academic research performance with bibliometric methods. VU University Amsterdam. Amsterdam. [lecture].
- Raan A.F.J. van (15 June 2008), Working visit. Working visit with State Secretary Prof. Frieder Meyer-Krahmer. Bundesministerium für Forschung und Technologie (BMBF). Bonn. [lecture].
- Raan A.F.J. van (28 March 2008), For Your Ranking Only?. International Research Universities Network (IRUN). Barcelona. [lecture].
- Raan A.F.J. van (29 May 2008), Bibliometric analysis of research quality. University of St. Andrews. [lecture].
- Raan A.F.J. van (29 April 2008), Principles of advanced bibliometric methods to assess academic research performance. King’s College London. London. [lecture].
- Raan A.F.J. van (13 June 2008), Working visit. HEFCE. Bristol. [lecture].
- Raan A.F.J. van (18 March 2008), Measuring Academic Research Performance with Advanced Bibliometric Methods. University of East Anglia, Norwich. Norwich. [lecture].
- Raan A.F.J. van (8 May 2008), Meting van wetenschappelijke prestaties. Utrecht University. Utrecht. [lecture].
- Raan A.F.J. van (12 October 2008), Measuring research performance in the social sciences and the humanities;. Amsterdam World Book Capital 2008 Conference Dodo or Dog. Amsterdam. [lecture].
- Raan A.F.J. van (4 September 2008), Evaluation of Scientific Research by Advanced Quantitative Methods. 2nd European Conference on Scientific Publishing in Biomedicine and Medicine. Oslo. [lecture].
- Raan A.F.J. van (27 November 2008), Bibliometrische analyse van onderzoeksprestaties: Wat doen we er mee?. LUMC Najaarsconferentie. Wassenaar. [lecture].
- Raan A.F.J. van (21 May 2008), Measuring Science: Assessment of Research Performance and Monitoring of Scientific Developments. Workshop Citation Cultures, National Research School WTMC. Ravenstein. [lecture].
- Raan A.F.J. van (12 December 2008), The scope of bibliometric approaches in foresight studies. IFQ Jahrestagung. [lecture].
- Raan A.F.J. van (15 May 2008), Assessment of academic research performance with bibliometric methods. University of Amsterdam, AMC. Amsterdam. [lecture].
- Raan A.F.J. van (17 September 2008), Measuring Quality and Impact of the Social Sciences Concepts, Opportunities and Drawbacks. Pre-Conference of the 10th International Conference on Science and Technology Indicators. Vienna. [lecture].
- Raan A.F.J. van (2 October 2008), Trombose en hemostase: Nederlandse onderzoeksprestaties in internationaal perspectief. Nederlandse Vereniging voor Trombose en Hemostase (NVTH). Den Haag. [lecture].
- Raan A.F.J. van (28 January 2008), A brief guide to bibliometrics. HEFCE Consultation Event Research Excellence Framework. Edinburgh. [lecture].
- Raan A.F.J. van (18 September 2008), Measuring Science. 10th International Conference on Science and Technology Indicators. [lecture].
- Raan A.F.J. van (19 February 2008), Evaluation of Academic Research with Advanced Bibliometric Methods, results of the Uppsala study. Uppsala University. Uppsala. [lecture].
- Raan A.F.J. van (31 March 2008), Meting van wetenschappelijke prestaties in de technische wetenschappen. Technische Universiteit Delft. Delft. [lecture].
- Raan A.F.J. van (26 March 2008), Measuring Academic Research Performance with Advanced Bibliometric Methods, particularly in the Social Sciences. Rotterdam School of Management, ERIM Workshop. Rotterdam. [lecture].
- Raan A.F.J. van (23 October 2008), The Leiden ranking: Bibliometric analyses of academic research. Dag van de Onderzoeker. Brussel. [lecture].
- Raan A.F.J. van (8 December 2008), Research assessment in international perspective by bibliometric methods. Danish National Research Foundation. [lecture].
- Raan A.F.J. van (2 March 2008), Measuring Academic Research Performance with Advanced Bibliometric Methods, results of the UNL study. Universidade Nova de Lisboa. Lisboa. [lecture].
- Raan A.F.J. van (7 April 2008), Meting van wetenschappelijke prestaties in de sociale wetenschappen. Tilburg University. Tilburg. [lecture].
- Raan A.F.J. van (25 February 2008), Bibliometrie als Instrument der Forschungsevaluation und Wissenschaftskartografie. Deutsche Physikalische Gemeinschaft Tagung 2008. Berlin. [lecture].
- Raan A.F.J. van (5 June 2008), Size, rankings and bibliometrics. OECD/Nordic Universities Association Conference. Reykjavik. [lecture].
- Raan A.F.J. van (10 January 2008), Working visit University London. working visit. London. [lecture].
- Raan A.F.J. van (5 November 2008), Meting van wetenschappelijke prestaties. Radboud Universiteit, Nijmegen. Nijmegen. [lecture].
- Raan A.F.J. van (31 January 2008), Measuring Academic Research Performance with Advanced Bibliometric Methods. University of Southampton. Southampton. [lecture].
- Raan A.F.J. van (6 June 2007), Bibliometric analysis to measure the quality of UK research. HEFCE Board, London. London. [lecture].
- Raan A.F.J. van (28 October 2007), Measuring Science. International Workshop on Innovation and Performance Measurement. Beijing. [lecture].
- Raan A.F.J. van (2 February 2007), The Ranking is Not Enough. Lessons from new bibliometric studies. International Ranking Symposium, Leiden. Leiden. [lecture].
- Raan A.F.J. van (15 November 2007), Rankings are for ever. Seminar Universiteitsraad, Universiteit Groningen. Groningen. [lecture].
- Raan A.F.J. van (26 October 2007), Making Science Maps with Bibliometric Data. Evaluation Centre, Institute of Policy and Management, Chinese Academy of Sciences, Beijing. Beijing. [lecture].
- Raan A.F.J. van (26 October 2007), Advanced bibliometric methods in the evaluation of research in universities. Evaluation Centre, Institute of Policy and Management, Chinese Academy of Sciences, Beijing. Beijing. [lecture].
- Raan A.F.J. van (13 October 2007), Bibliometrie en rankings. Rektorenconferentie Universiteit Utrecht. Utrecht. [lecture].
- Raan A.F.J. van (20 September 2007), Scoping study on the use of bibliometric analysis to measure the quality of research in UK higher education institutions. HEFCE Board. London. [lecture].
- Raan A.F.J. van (9 July 2007), Scoping study on the use of bibliometric analysis to measure the quality of research in UK higher education institutions. International HEFCE Seminar. Leiden. [lecture].
- Raan A.F.J. van (27 November 2007), Development and application of bibliometric techniques. Workshop on the Assessment of research. [lecture].
- Raan A.F.J. van (7 December 2007), Framework for the assessment and funding of UK research. HEFCE. London. [lecture].
- Raan A.F.J. van (2 August 2007), Scoping study on the use of bibliometric analysis to measure the quality of research in UK higher education institutions. HEFCE Workshop, London. London. [lecture].
- Raan A.F.J. van (21 March 2007), Bibliometric analysis for research performance assessment. HEFCE, Bristol. Bristol. [lecture].
- Raan A.F.J. van (26 November 2007), Application of bibliometric methods in the evaluation of academic research. University of Kent, Canterbury. Canterbury. [lecture].
- Raan A.F.J. van (13 July 2007), Scoping study on the use of bibliometric analysis to measure the quality of research in UK higher education institutions. HEFCE, London. London. [lecture].
- Raan A.F.J. van (10 March 2006), Measuring scientific performance. CHEPS, Universiteit Twente. Enschede. [lecture].
- Raan A.F.J. van (28 November 2006), Rankings Are For Ever. Workshop on Ranking of Universities. Bern. [lecture].
- Raan A.F.J. van & Wende M. van der (21 June 2006), Van nationale studiekeuzeinformatie naar internationale kwaliteitsvergelijking. Workshop Studiekeuzetoets- en rankingsystemen. Leiden. [lecture].
- Raan A.F.J. van (23 March 2006), For Your Ranking Only. RDF Workshop, University of Stellenbosch. Stellenbosch. [lecture].
- Raan A.F.J. van (2006), Measuring science. Georgia Institute of Technology. Atlanta. [lecture].
- Raan A.F.J. van (22 June 2006), Stad en regio: positie van Leiden als kenniscentrum in de Europese top: behoud en versterking heeft bestuurlijke consequenties. Regiocongres Holland Rijnland. Leiden. [lecture].
- Raan A.F.J. van (6 February 2006), Forschungsleistung als neuer Indikator im CHE Ranking’. Centrum für Hochschulentwicklung (CHE)*. Gütersloh, Germany. [lecture].
- Raan A.F.J. van (2 October 2006), Evaluation of academic performance by advanced bibliometric methods. Uppsala University. Uppsala. [lecture].
- Raan A.F.J. van (15 March 2006), Bibliometric network analysis. DRIFT, Erasmus Universiteit Rotterdam. Rotterdam. [lecture].
- Raan A.F.J. van (16 February 2006), For your ranking only. International Symposium on Ranking of Universities. Leiden. [lecture].
- Raan A.F.J. van (2006), Measuring Science. Conference on Excellence in Life Science (ELSA). Stockholm. [lecture].
- Raan A.F.J. van (12 December 2006), The Ranking Hype. 20 years Elsevier-CWTS collaboration. Leiden. [lecture].
- Raan A.F.J. van (30 June 2006), Evaluation of Academic Performance by Advanced Bibliometric Methods. Workshop ‘Evaluating Academic Performance: Mission Impossible?’. Crans-Montana. [lecture].
- Raan A.F.J. van (19 May 2006), License to Rank. Annual Meeting of the Coimbra Group, University of Tartu. Tartu, Estonia. [lecture].
- Raan A.F.J. van (12 December 2006), Ingredients of highlights during 20 years Elsevier-CWTS collaboration. 20 years Elsevier-CWTS collaboration. Leiden. [lecture].
- Raan A.F.J. van (2 March 2006), Bibliometrische Methoden als Instrument der Forschungsevaluation und der Wissenschaftskartierung. Ambassade van Zwitserland, Den Haag. Den Haag. [lecture].
- Raan A.F.J. van (15 November 2006), Evaluation of the output and impact of universities. !st PRIME-ENIP Conference. Lugano. [lecture].
- Raan A.F.J. van (7 September 2006), Field-specific citation density and research group impact: Size-dependent cumulative advantage and performance-related statistical phenomena in bibliometric analysis. Ninth Science and Technology Indicators Conference. Leuven. [lecture].
- Raan A.F.J. van (12 June 2006), Advanced bibliometric methods: Research evaluation, benchmarking and science mapping. University of Aarhus, Sandbjerg Estates, Sønderborg. Sønderborg. [lecture].
- Raan A.F.J. van & Wende M. van der (21 June 2006), Ontwikkeling van internationale ranking-systemen. Workshop Studiekeuzetoets- en rankingsystemen. Leiden. [lecture].
- Raan A.F.J. van (16 June 2006), Benchmarking of universities with Advanced Bibliometric Methods. University of Manchester. Manchester. [lecture].
- Raan A.F.J. van (9 June 2006), The application of advanced bibliometric methods in research performance assessment. Lund University. Lund. [lecture].
- Raan A.F.J. van (13 January 2006), Discovery of emerging and converging fields of science’. Working meeting, EC-EMCOTEC project. Brussels, Belgium. [lecture].
- Raan A.F.J. van (2006), Measurement of the characteristics of the research system with bibliometric methods. National Science Foundation. Arlington. [lecture].
- Raan A.F.J. van (27 November 2006), Measuring science: Evaluation of the research output of universities. University of Aarhus. Aarhus. [lecture].
- Raan A.F.J. van (27 June 2006), Het in kaart brengen van mogelijkheden tot valorisatie van wetenschappelijke kennis. Congres ‘Effectieve organisatie van innovatie’. Den Haag. [lecture].
- Raan A.F.J. van (26 September 2004), Measuring science: Research evaluation and mapping of scientific developments to Reinforce Innovation. DEAN Conference. University of Porto. [lecture].
- Raan A.F.J. van (11 October 2004), Measuring science: Research evaluation and mapping of scientific developments. University of Cordoba. Spanje. [lecture].
- Raan A.F.J. van (15 January 2004), Measuring science. Colloquium. FOM Institute of Atomic and Molecular Physics. Amsterdam. [lecture].
- Raan A.F.J. van (15 April 2004), De positie van Nederland in wetenschap en technologie. Nederlands Forum voor Wetenschap en Techniek. Academiegebouw Universiteit Leiden. [lecture].
- Raan A.F.J. van (24 June 2004), Maatschappelijk publiceren en waarderen van wetenschap. Congres Maatschappelijk publiceren voor de kennissamenleving Stichting Weten / Science Alliance, NEMO. Amsterdam. [lecture].
- Raan A.F.J. van (31 May 2004), Leiden Bezoekersstad. Bijeenkomst Grote Stedenbeleid, Stadsbestuur Leiden. Kenniscentrum Leiden. [lecture].
- Raan A.F.J. van (14 October 2004), Measuring science: Application of bibliometric methods for research evaluation. University of Granada. Spanje. [lecture].
- Raan A.F.J. van (15 January 2004), Measurement of scientific quality by bibliometric analysis. LERU (League of the European Research Universities) Workshop. Catholic University of Leuven, Belgium. [lecture].
- Raan A.F.J. van (10 March 2004), Over de meetbaarheid van wetenschap. Provinciaal Utrechts Genootschap. Utrecht. [lecture].
- Raan A.F.J. van (23 September 2004), Measuring science: Some first exercises with structures and statistics. Eight International Science and Technology Indicators Conference. Leiden. [lecture].
- Raan A.F.J. van (8 June 2004), Over het wetenschappelijk presteren van de Universiteit Leiden. Strategische Conferentie Universiteitsbestuur Leiden. Galamadammen, Koudum. [lecture].
- Raan A.F.J. van (20 April 2004), Measuring science. Karolinska Institute. Stockholm. [lecture].
- Raan A.F.J. van (14 October 2004), Science mapping: Principles and applications. University of Granada. Spanje. [lecture].
- Raan A.F.J. van (20 September 2004), Basic principles of measuring science in relation to research assessment. Wolfson College. Oxford University. [lecture].
- Raan A.F.J. van (2004), Meer kennis uit publicaties. Annual Senter-IOP themadag Grensvlakken, bron van innovaties. Utrecht. [lecture].
- Raan A.F.J. van (18 March 2004), Leiden Stad van Ontdekkingen. Rotary Leiden-Oost. Leiden. [lecture].
- Raan A.F.J. van (13 May 2004), Evaluation and mapping of scientific research. National Academies of Science. Washington DC. [lecture].
- Raan A.F.J. van (6 April 2004), Leiden, 2030 scenario's, en de regio. Bijeenkomst Toekomstscenario's Leiden 2030. Stadsbestuur Leiden. [lecture].
- Raan A.F.J. van (18 August 2004), Research performance assessment by bibliometric methods. ETH. Zürich. [lecture].
- Raan A.F.J. van (1 October 2004), Assessment of research quality: The use of bibliometric indicators. Foundation for Science and Technology (FCT). Lisbon. [lecture].
- Raan A.F.J. van (3 March 1999), Application of quantitative methods in the evaluation of research fields in the social sciences. invited lecture national, Onderzoekschool SOM (Bedrijfskunde, Economie). Rijksuniv. Groningen, Groningen. [lecture].
- Raan A.F.J. van (1 July 1999), Dynamiek van de kwaliteitsbeoordeling in wetenschappelijk onderzoek. lecture national, Faculteit Exacte Wetenschappen: Expert Workshop Kwaliteit in Biomedisch en Farmaceutisch Onderzoek. Vrije Universiteit, Amsterdam. [lecture].
- Raan A.F.J. van (15 March 1999), Advanced bibliometric methods in the evaluation and monitoring of research units and institutes. invited lecture international, Medical Research Council (MRC), MRC-Steering Group for Monitoring and Evaluation. London (England). [lecture].
- Raan A.F.J. van (12 November 1999), Evaluation and monitoring of research in applied fields of science. lecture international, Grain Research & Development Corporation (GRDC). Canberra (Australia). [lecture].
- Raan A.F.J. van (17 November 1999), Assessing R&D strengths and weaknesses and charting developments in S&T through bibliometrics. lecture international, Department of Science and Industry. Canberra (Australia). [lecture].
- Raan A.F.J. van (28 September 1999), Data-mining en de toepassing op wetenschappelijke publicaties. lecture national, Stichting Toekomstbeeld der Techniek. Den Haag (The Netherlands). [lecture].
- Raan A.F.J. van (19 November 1999), Anwendung bibliometrischer Methoden bei der Messung von Forschungsleistung. lecture international. Wissenschaftsrat, Cologne (Germany). [lecture].
- Raan A.F.J. van (3 May 1999), Die Forschungsleistung der Medizinischen Fakultät Münster in internationaler Perspektive. Ergebnisse einer bibliometrischen Evaluation. invited lecture international, Universität Münster. Münster (Germany). [lecture].
- Raan A.F.J. van (11 May 1999), The growth of science. Comments on John Maddox' "What remains To Be Discovered ". invited lecture national, Studium Generale Univ.Amsterdam. Amsterdam (The Netherlands). [lecture].
- Raan A.F.J. van (28 May 1999), Measuring Science: Between Taboo and Trend. invited lecture national, Onderzoekschool Ontwikkelingsbiologie. Congrescentrum De Bron, Dalfsen (The Netherlands). [lecture].
- Raan A.F.J. van (3 November 1999), Assessment of research performance: implications for research policy and universities. lecture international. University of New South Wales, Sydney (Australia). [lecture].
- Raan A.F.J. van (15 November 1999), R&D evaluation in the beginning of the 21st century. lecture international, Conference 'Data & Strategies in Evaluating Research & Development, November 15-16,. Australian National Univ., Canberra (Australia). [lecture].
- Raan A.F.J. van (9 November 1999), A bibliometric approach to growth, ageing, and differentiation of science. lecture international, University of Melbourne. Melbourne (Australia). [lecture].
- Raan A.F.J. van, Moed H.F. & Tijssen R.J.W. (1 September 1999), College: Cognitive and Structural Development of Scientific and Technological Knowledge (in Dutch). lectures national, CWTS-college. Leiden Univ, Leiden (The Netherlands). [lecture].
- Raan A.F.J. van (8 November 1999), Advanced bibliometric methods to evaluate and monitor scientific research, particularly interdisciplinary developments. lecture international. University of Wollongong, Wollongong (Australia). [lecture].
- Raan A.F.J. van (3 December 1999), Meting van wetenschappelijke prestaties. lecture national, Faculteit der Technische Wetenschappen. Technische Univ. Delft, Delft. [lecture].
- Raan A.F.J. van (20 October 1999), Bibliométrie et évaluation de la recherche biomédicale. invited lecture international, Congres Evaluation de la recherche biomédicale/Assises Hospitalo-Universitaires. Université de Nancy (France). [lecture].
- Raan A.F.J. van (1 September 1999), Het meten van wetenschappelijke prestaties en ontwikkelingen. lecture national, Rotary Leiden-Oost. Leiden (The Netherlands). [lecture].
- Raan A.F.J. van (9 February 1998), Tafelrede Diesbijeenkomst Leidse Hoogleraren. 423ste Dies Natalis Rijksuniversiteit Leiden. Leiden. [lecture].
- Raan A.F.J. van (4 July 1998), Advanced bibliometric indicators for the evaluation of universities. International Expert EC-Meeting on Science and the Academic System in transition. Vienna (Austria). [lecture].
- Raan A.F.J. van (1 April 1998), Meting van de kwaliteit van wetenschappelijk onderzoek. Studiedag 'Tussen praktijkgerichtheid en fundamenteel: de kwaliteit van bestuurskundig onderzoek'. Universiteit Leiden, Leiden. [lecture].
- Raan A.F.J. van (28 September 1998), Het in kaart brengen van wetenschappelijke ontwikkelingen. Commissie voor de biochemie en de biofysika, Koninklijke Nederlandse Akademie van Wetenschappen (KNAW). Amsterdam. [lecture].
- Raan A.F.J. van (8 June 1998), Forschungsprofil der Fraunhofer-Gesellschaft im Vergleich mit anderen Organisationen der angewandten Forschung. Evaluierungskommission der Fraunhofer-Gesellschaft, Fraunhofer-Institut fuer Arbeitswissenschaft und Organisation. Stuttgart (Germany). [lecture].
- Raan A.F.J. van (10 December 1998), Wetenschapsbeleid in Nederland: weinig breedte, weinig diepte. Algemene bespiegelingen met een accent op de geesteswetenschappen. Bijeenkomst Onderzoekschool Literatuurwetenschap, Universiteit Utrecht. Utrecht. [lecture].
- Raan A.F.J. van (8 October 1998), Selectie en wetenschap: criteria voor internationaal erkend onderzoek. Lustrumcongres 'Grenzeloze Selectie' Katholieke Universiteit Nijmegen. Nijmegen. [lecture].
- Raan A.F.J. van (28 May 1998), Monitoring and evaluation of promising areas of interdisciplinary research with a wide range of applications. Workshop on RTD Results and Impact, European Commission (28-29 May). Brussels (Belgium). [lecture].
- Raan A.F.J. van (26 November 1998), Toepassing van kwantitatieve, in het bijzonder bibliometrische methoden bij de beoordeling van wetenschappelijk onderzoek. Bijeenkomst Universiteit Utrecht. Utrecht. [lecture].
- Raan A.F.J. van (3 December 1998), Bibliometric methods. Cursus, Stichting G.O.. The Hague. [lecture].
- Raan A.F.J. van (30 October 1998), Monitoring the cognitive ecosystem of our scientific and technological knowledge by bibliometric cartography. Workshop US National Academy of Sciences, National Research Council, Office of Naval Research. Washington DC, USA. [lecture].
- Raan A.F.J. van (30 June 1998), Scientometric analysis as methodology to study important aspects of research collectives. Workshop 'Understanding the dynamics and role of public sector research (29 June-1 July). Ecole Normale Superieure des Mines, Paris, France. [lecture].
- Raan A.F.J. van (1 December 1998), Anwendung bibliometrischer Methoden bei der Bewertung von Forschungsleistungen. Medizinische Fakultät, Universität Münster. Muenster (Germany). [lecture].
- Raan A.F.J. van (13 March 1998), Current research information systems for technology watch. CRIS 98 Conference, European Commission (13-14 March). Luxembourg (Luxembourg). [lecture].
- Raan A.F.J. van (9 October 1998), Landkaarten van wetenschapsgebieden als zichzelf organiserende 'spin-off' van wereldwijd publiceren. Dispuut De Vijf III, Universiteit Leiden. Leiden. [lecture].
- Raan A.F.J. van (22 June 1998), Communication of scientific results by publication. Its consequences for evaluation and monitoring of research performance. Seminar on Evaluation and Strategic Planning in Science & Technology (21-23June) Romanian Academy of Sciences. Bucharest (Romania). [lecture].
- Raan A.F.J. van (16 October 1998), Wordt het imago van de natuurkunde door top-fysici en esoterisch onderzoek bepaald?. Bijeenkomst Nederlandse Vereniging voor Natuurkunde. Amsterdam. [lecture].
- Raan A.F.J. van (30 September 1998), Zin en onzin bij het meten van wetenschappelijk presteren. Uitnoding Universiteit Utrecht. Utrecht. [lecture].
- Raan A.F.J. van (24 September 1997), Wetenschappelijk onderzoek in de sociaal-economische context van de hedendaagse samenleving. Symposium Onderzoeksinstituut voor Evolutionaire en Ecologische Wetenschappen, Univ. Leiden. Leiden. [lecture].
- Raan A.F.J. van (21 November 1997), Ontwikkeling en toepassing van bibliometrische methoden bij het 'meten' van wetenschappelijke prestaties. Najaarsbijeenkomst Vereniging voor Ordinatie en Classificatie (VOC), Rijksuniv. Leiden. Leiden. [lecture].
- Noyons E.C.M. & Raan A.F.J. van (18 June 1997), Advanced mapping of science and technology. Sixth Conference of the International Society for Scientometrics and Informetrics (ISSI). Jerusalem, Israel. [lecture].
- Raan A.F.J. van (26 February 1997), Anwendung bibliometrischer Methoden bei der Bewertung von Forschungsleistungen und der Entwicklung von Wissenschaftskartographie. Colloquium Forschungszentrum GKSS. Geesthacht/Hamburg, Germany. [lecture].
- Tijssen R.J.W. & Raan A.F.J. van (26 September 1997), Wetenschappelijk rendement voor onderzoekinstellingen. Symposium Effectiviteit in EU-onderzoek, St. Science Alliance. The Hague. [lecture].
- Raan A.F.J. van (7 February 1997), De rol van publiceren in de wetenschap: mondiale versus lokale orientatie. Symposium Nederlands Tijdschrift voor de Geestelijke Volksgezondheid. Utrecht. [lecture].
- Raan A.F.J. van (1 July 1997), Die Anwendung bibliometrischer Methoden bei der Messung von Forschungsleistung. Seminar Medizinische Fakultaet Universitaet Tuebingen. Tuebingen, Germany. [lecture].
- Raan A.F.J. van (20 June 1997), Zin en onzin bij het meten van wetenschappelijke prestaties. Afscheidssymposium Dr Jaap van Eck, Fac. Natuur- en Sterrenkunde, Univ. Utrecht. Utrecht. [lecture].
- Raan A.F.J. van (23 October 1997), Application of advanced bibliometric methods in the analysis of research performance and scientific developments. NATO Workshop on Research Evaluation in Transition Economies. Moscow, Russia. [lecture].
- Raan A.F.J. van (24 May 1997), Topscholen in de wetenschap. Landelijk Openb. Debat Hoger Muziekonderwijs "Tweede fase en Toptalent". Utrecht. [lecture].
- Raan A.F.J. van (20 November 1997), Zin en onzin bij het meten van wetenschappelijke prestaties. Bijeenkomst Foods for Thought. Technische Univ. Delft. [lecture].
- Raan A.F.J. van (28 November 1997), Evaluation of performance and trends in basic and applied research by quantitative methods. NATO Workshop on science evaluation and its management (25-28 November). Prague (Czech Republic). [lecture].
- Raan A.F.J. van (7 November 1997), De bijdrage van Nederland, ook de historische, tot de ontwikkeling van de exacte wetenschappen. Colloquium Nederland en de Europese cultuur in de 20ste eeuw. Kon. Ac.voor Wetenschappen, Lett.en Schone Kunsten van Belgie/KNAW. Brussels, Belgium. [lecture].
- Raan A.F.J. van (19 September 1997), L'evaluation des laboratoires. Lecture International Symposium 'Scientific Communication in Life Sciences' Universite de Nancy. Nancy, France. [lecture].
- Raan A.F.J. van (9 June 1997), Beoordeling van wetenschappelijk onderzoek met kwantitatieve methoden. Lezing Rotary Club Leiden. Leiden. [lecture].
- Raan A.F.J. van (19 February 1997), Kartographische Darstellung des Forsungsgebietes der Grenzflaechenbestimmten Materialien. Lecture Working Group 'Prospektion der Forschung' Wissenschaftsrat. Cologne, Germany. [lecture].
- Raan A.F.J. van (26 September 1997), Wetenschappelijk onderzoek de maat genomen: collegiale beoordeling en bibliometrische methoden. Symposium Effectiviteit in EU-onderzoek, Sticht. Science Alliance. The Hague. [lecture].