Thed van Leeuwen
Researcher
- Name
- Dr. T.N. van Leeuwen
- Telephone
- +31 71 527 3970
- leeuwen@cwts.leidenuniv.nl
- ORCID iD
- 0000-0001-7238-6289
Senior researcher at CWTS. Thed's research focuses on the relationships between (reforms of) research evaluation, open scholarship, and research integrity, as well as on the research assessment of scholarly activity in the social sciences, the humanities, and law. He is co-editor of the OUP journal Research Evaluation.
Thed van Leeuwen is a senior researcher at CWTS. His research interests are in the triangular relationship of (the reform of) research evaluation, open science, and research integrity. Thed is also interested in the evaluation of research in general, and in the social sciences, law and the humanities in particular, as well in the ways research quality is perceived in research assessment contexts. The overarching science policy context under which research assessments are organized and the role of quantitative and qualitative information is dealt with are of major concern for this research agenda. Thed is co-editor of the journal Research Evaluation, published by Oxford University Press, member of the Core Team of the Research Intelligence Network Netherlands (RINN), as well as current President of the European Network of Indicator Designers (ENID, until September 2023).
Thed is a member of the Evaluation & Culture focal area and a member of the Information & Openness focal area.
Researcher
- Faculteit der Sociale Wetenschappen
- CWTS
- Isager P.M., Lakens D., Leeuwen T. van & Veer A.E. van 't (2023), Exploring a formal approach to selecting studies for replication: a feasibility study in social neuroscience, Cortex 171: 330-346.
- Brasil A., Chen C.M. & van Leeuwen T. (2022), Analysing open access publishing beyond Plan S: motivations for publishing in Hybrid and Bronze OA formats. 26th International Conference on Science and Technology Indicators 7 September 2022 - 9 September 2022: Zenodo.
- Brasil Varandas Pinto A. & van Leeuwen T. (2022), The unseen costs of article processing charges: the different realities of Brazil and the Netherlands. 26th International Conference on Science and Technology Indicators 7 September 2022 - 9 September 2022: Zenodo.
- Colavizza G., Costas Comesana R., Traag V.A., Eck N.J.P. van, Leeuwen T.N. van & Waltman L.R. (2021), A scientometric overview of CORD-19, PLoS ONE 16(1): e0244839.
- Sixto-Costoya A., Robinson-Garcia N., Leeuwen T.N. van & Costas Comesana R. (2021), Exploring the relevance of ORCID as a source of study of data sharing activities at the individual-level: a methodological discussion, Scientometrics 126: 7149-7165.
- Leeuwen T.N. van & Waltman S.R. (28 September 2021), Practicing what we preach: our journey toward open science. Leiden Madtrics. Leiden: Leiden University. [blog entry].
- Rijcke S. de, Waltman L.R. & Leeuwen T.N van (19 May 2021), Halt the h-index. Halt the h-index. Leiden University: Leiden Madtrics. [blog entry].
- Waaijers L.J.M., Waltman L.R., Vries S.C.J. de, Leeuwen T.N. van & Eck N.J.P van (2 March 2021), Bona Fide Journals: creating a predatory-free academic publishing environment. Leiden Madtrics. [blog entry].
- Bieszczad S.R., Zuijderwijk J. & Leeuwen T.N. van (7 July 2020), Could pre-Covid-19 research into coronaviruses have been otherwise?: Episode one: Careers. Could pre-Covid-19 research into coronaviruses have been otherwise? Episode one: Careers. Leiden University: Leiden Madtrics. [blog entry].
- Robinson-Garcia N., Costas R. & Leeuwen T.N. van (2020), Open Access uptake by universities worldwide, PeerJ 8: e9410 (e9410).
- Waaijer C.J.F., Ommering B.W.C., Van der Wurff L.J., Van Leeuwen T.N. & Dekker F.W. (2019), Scientific activity by medical students: the relationship between academic publishing during medical school and publication careers after graduation, Perspectives on medical education 8(4): 223-229.
- Colavizza G., Franssen T. & Leeuwen T.N. van (2019), An empirical investigation of the Tribes and their Territories: are research specialisms rural and urban?, Journal of Informetrics 13(1): 105-117.
- Ellemers N., Toorn J. van der, Paunov Y. & Leeuwen T. van (2019), The psychology of morality: A review and analysis of empirical studies published from 1940 through 2017, Personality and Social Psychology Review 23(4): 332-366.
- Rozing M.P., Leeuwen T.N. van, Reitsma P.H., Rosendaal F.R. & Aziz N.A. (2019), Freeloading in biomedical research, Scientometrics 122: 47-55.
- Van Leeuwen T.N., Meijer I., Yegros-Yegros A. & Costas R. (2018), Developing indicators on Open Access by combining evidence from diverse data sources. 2nd International Conference in Science & Technology Indicators (STI), 6-8 September, 2017, Paris, France 6 September 2017 - 8 September 2017. Paris, France: Proceedings of the 2017 STI Conference.
- Van Leeuwen T.N., Kool L.L. & Wijk I. (2018), National OA mandate and its potential conflicting relationship with international scientific cooperation policies: the Dutch case. Costas R., Franssen T. & Yegros-Yegros A. (Eds.). STI Conference 12 September 2018 - 14 September 2018. Leiden: STI Conference Proceedings.
- Martín-Martín A., Costas R., Van Leeuwen T.N. & Delgado López Cózar E. (2018), Unbundling Open Access dimensions: a conceptual discussion to reduce terminology inconsistencies, Proceedings of the 23rd International Conference on Science and Technology Indicators. STI Conference 12 September 2018 - 14 September 2018.
- Van Leeuwen T. (2018) Measuring Research: What Everyone Needs to Know. Review of: Sugimoto C.R. & Lariviere V. (2018), Measuring Research: What Everyone Needs to Know. Journal of Informetrics 12(4): 1232-1234.
- Robinson-Garcia N., Leeuwen T.N. van & Rafols I. (2018), Using altmetrics for contextualised mapping of societal impact: From hits to networks, Science and Public Policy 45(6): 815-826.
- Luwel M., Van Eck N.J. & Van Leeuwen T. (2018), The Schön case: Analyzing in-text citations to papers before and after retraction, Proceedings of the 23rd International Conference on Science and Technology Indicators. 23rd International Conference on Science and Technology Indicators 12 September 2018 - 14 September 2018. Leiden: 23rd International Conference on Science and Technology Indicators. 1025-1030.
- Van Leeuwen T.N., Clifford Tatum & Wouters P.F. (2018), Exploring Possibilities to Use Bibliometric Data to Monitor Gold Open Access Publishing at the National Level, Journal of the Association for Information Science and Technology 69(9): 1161-1173.
- Martín-Martín A., Costas Comesana R., Leeuwen T.N. van & López-Cózar E.D. (2018), Evidence of open access of scientific publications in Google Scholar: a large-scale analysis, Journal of Informetrics 12(3): 819-841.
- Yegros A. & Leeuwen T.N. van (2018), Production and uptake of Open Access publications involving the private sector: the case of big pharma. Costas R., Franssen T. & Yegros A. (Eds.), Proceedings of the 23rd international conference on science and technology indicators. 23rd International Conference on Science and Technology Indicators 12 September 2018 - 14 September 2018. Leiden: CWTS. 958-966.
- De Rijcke S., Holtrop H., Kaltenbrunner W., Zuijderwijk J., Beaulieu A., Franssen T., Van Leeuwen T.N., Mongeon P., Tatum C.T., Valkenburg G. & Wouters P.F. (2018), Evaluative Inquiry: Engaging research evaluation analytically and strategically. Impact of Social Sciences and Humanities for a European Research Agenda – Valuation of SSH in mission-oriented research 28 November 2018 - 29 November 2018. Vienna: EU Council Conference on Impact of Social Sciences and Humanities for a European Research Agenda – Valuation of SSH in mission-oriented research.
- Prins A., Spaapen J., Van Leeuwen T.N. & Van den Broek-Honingh N. (2018), QRiH: Towards a fitting system for humanities research evaluation . Pathways to Impact of SSH research 29 November 2018 - 29 November 2018. Vienna: Pathways to Impact of SSH research.
- Leeuwen T.N. van Reyes Elizondo A.E. Rijcke S. de Wouters P.F. (2018), Policy brief for scientific and scholarly publishers no. D 5.3. Nijmegen: Radboud Universiteit.
- Schneider J.W., Aagaard K., Visser M.S. & Van Leeuwen T.N. (2017), Examining potential database effects in longitudinal country impact analyses using fixed journal sets. 2nd International Conference in Science & Technology Indicators (STI), 6-8 September, 2017, Paris, France 6 September 2017 - 8 September 2017: STI Conference, Paris, France.
- Berghmans S., Cousijn H., Deakin G., Meijer I., Mulligan A., Plume A., De Rijcke S., Rushforth A., Tatum C., Van Leeuwen T. & Waltman L. (2017), Open Data: The researcher perspective: CWTS / Elsevier / Universiteit Leiden.
- Van Leeuwen T.N. & Wouters P.F. (2017), Analysis of Publications on Journal Impact Factor Over Time, Frontiers in Research Metrics and Analytics 2: e4.
- Aksnes D.W., Sivertsen G., Van Leeuwen T.N. & Wendt K.K. (2017), Measuring the productivity of national R&D systems: challenges in cross-national comparisons of R&D input and publication output indicators, Science and Public Policy 44(2): 246-258.
- Bruno K., Larsen K. & Van Leeuwen T.N. (2017), Knowledge production at industrial research institutes: Institutional logics and struggles for relevance in the Swedish Institute for Surface Chemistry, 1980-2005, Research Evaluation 26(4): 337-348.
- Peterse E.F.P., Van Leeuwen T.N. & Cleton-Jansen A.M. (2017), In vitro studies of osteosarcoma: a researcher's perspective of quantity and quality, Journal of Bone Oncology 7: 29-31.
- Reyes Elizondo A.E. Rijcke S. de Leeuwen T.N. van (2017), Handling publishing misconduct: tools used by publishing houses and editors no. PRINTEGER D 3.8. Nijmegen: Radboud Universiteit.
- Van Leeuwen T.N., Van Wijk E. & Wouters P.F. (2016), Bibliometric analysis of output and impact based on CRIS data: A case study on the registered output of a Dutch university, Scientometrics 106(1): 1-16.
- Van Welie S.D., Van Leeuwen T.N., Bouma C.J. & Klaassen A.B.M. (2016), The joint cardiovascular research profile of the university medical centres in the Netherlands, Netherlands Heart Journal 24(5): 308-316.
- Díaz-Faes A., Bordons M. & Van Leeuwen T.N. (2016), Integrating metrics to measure research performance in social sciences and humanities: The case of the Spanish CSIC, Research Evaluation 25(4): 451-460.
- Rushforth A., Yegros A., Mongeon P. & Van Leeuwen T.N. (2016), How does ‘undone science’ get funded? A bibliometric analysis linking Rare Diseases publications to national and European funding sources. EU-SPRI Early Career Researcher Conferences 21 November 2016 - 23 November 2016.
- Prins A.A.M., Costas R., Van Leeuwen T.N. & Wouters P.F. (2016), Using Google Scholar in research evaluation of humanities and social science programs: A comparison with Web of Science data, Research Evaluation 25(3): 264-270.
- Robinson-Garcia N., Van Leeuwen T.N. & Rafols I. (2016), SSH & the City. A Network Approach for Tracing the Societal Contribution of the Social Sciences and Humanities for Local Development. STI Conference, 21st Int. Conf. on Science and Technology Indicators 14 September 2016 - 16 September 2016.
- Díaz-Faes A.A., Bordons M., Van Leeuwen T.N. & Purificación Galindo M. (2015), Outlining the scientific activity profile of researchers in the Social Sciences and Humanities in Spain: The case of CSIC, Proceedings of the 15th International Conference of the International Society for Scientometrics and Informetrics. 15th International Conference on Scientometrics and Informetrics (ISSI), 29 Jun-4 July, 2015, Bogazici University, Istanbul (Turkey) 29 June 2015 - 4 July 2015 548-553.
- Wooding S., Van Leeuwen T.N., Parks S., Kapur S. & Grant J. (2015), UK doubles its "world-leading" research in Life Sciences and Medicine in six years: Testing the claim?, PLoS ONE 10(7): e0132990.
- De Groot C.J.M., Van Leeuwen T.N., Mol B.J. & Waltman L. (2015), A longitudinal analysis of publications on maternal mortality, Paediatric and Perinatal Epidemiology 29(6): 481-489.
- Van Leeuwen T.N., Tatum C. & Wouters P.F. (2015), Open Access publishing and citation impact - An international study, Proceedings of the 15th International Conference of the International Society for Scientometrics and Informetrics. 15th International Conference on Scientometrics and Informetrics (ISSI), 29 Jun-4 July, 2015, Bogazici University, Istanbul (Turkey) 29 June 2015 - 4 July 2015 1130-1141.
- Prins A., Costas R., Leeuwen T.N. van & Wouters P.F. (2014), Using Google Scholar in research evaluation of social science programs, with a comparison with Web of Science data, Proceedings of the 19th International Conference on Science and Technology Indicators. 19th International Conference on Science and Technology Indicators 3 September 2014 - 5 September 2015 434-443.
- Prins A., Costas R., Van Leeuwen T.N. & Wouters P.F. (2014), Using Google Scholar in research evaluation of social science programs, with a comparison with Web of Science data, Proceedings of the 18th International Conference on Science and Technology Indicators, Leiden, The Netherlands. . Leiden 434-443.
- Den Hertog P., Jager C.-J., Vankan A., Te Velde R., Veldkamp J., Aksnes D.W., Sivertsen G., Van Leeuwen T.N. & Van Wijk E. (2014), Challenges in measuring the efficiency of national science, technology & innovation systems.
- Van Leeuwen T.N. & Luwel M. (2014), An in-depth analysis of papers retracted in the Web of Science. Conference paper, Proceedings of the 19th International Conference on Science and Technology Indicators. . Leiden 337-344.
- Costas R., Leeuwen T.N. van & Raan A.F.J. van (2014), Erratum to "Effects of the durability of scientific literature at the group level: Case study of chemistry research groups in the Netherlands" [Res. Policy 42 (4) (2013) 886-894], Research Policy 43(8): 1468-1468.
- Den Hertog P., Jager C.J., Vankan A., Te Velde R., Veldkamp J., Aksnes D.W., Sivertsen G., Van Leeuwen T.N. & Van Wijk E. (2014), Scholarly publication patterns in the social sciences and humanities and their relationship with research assessment. Thematic paper 2 Ministry of Education, Culture and Science no. 2010.056-1436. Utrecht: Ministry of Education, Culture and Science.
- Schneider J.W. & Van Leeuwen T.N. (2014), Analyzing robustness and uncertainty levels of bibliometric performance statistics supporting science policy. A case study evaluating Danish post-doc funding, Research Evaluation 23(4): 285-297.
- Aksnes D.W., Van Leeuwen T.N. & Sivertsen G. (2014), The effect of booming countries on changes in the relative specialization index (RSI) on country level, Scientometrics 101(2): 1391-1401.
- Leeuwen T. van, Costas Comesana R., Calero-Medina C. & Visser M. (2013), The role of editorial material in bibliometric research performance assessments, Scientometrics 95(2): 817-828.
- Van Leeuwen T. (2013), Publication trends in social psychology journals: A long-term bibliometric analysis, En Letra 43(1): 9-11.
- Costas Comesana R., Leeuwen T.N. van & Raan A.F.J.van (2013), Effects of the durability of scientific literature at the group level: case study of chemistry research groups in the Netherlands, Research Policy 42(4): 886-894.
- Van Leeuwen T.N., Kriegsman L., Van Tol J. & Schokkenbroek J. (2013), The changing role of museums in the global scientific landscape, Journal of Scientometric Research 2(2): 137-145.
- Van Leeuwen T.N. (2013), Bibliometric research evaluations, Web of Science and the Social Sciences and Humanities: A problematic relationship?, Bibliometrie - Praxis und Forschung 2: 1-18.
- Waltman L., Van Eck N.J., Van Leeuwen T.N. & Visser M.S. (2013), Some modifications to the SNIP journal impact indicator, Journal of Informetrics 7(2): 272-285.
- Levi M.M., Sluiter H., Van Leeuwen T.N., Rook M. & Peters G. (2013), Medisch-wetenschappelijk onderzoek in Nederland. Hoge kwaliteit door samenwerking UMC's en opleidingsziekenhuizen, Nederlands Tijdschrift voor Geneeskunde 157: A6081.
- Van Leeuwen T.N., Van Wijk E. & Wouters P.F. (2013), Recent developments in Dutch research assessment. Scholarly activity in AAH and Law in a new perspective, Proceedings of the 18th Conference on Science and Technology Indicators. 396-398.
- Schneider J.W. & Van Leeuwen T.N. (2013), Is post-doc funding stimulating research performance? Evidence from Danish research policy!, Proceedings of the 18th International Conference on Science and Technology Indicators. 352-361.
- Aksnes D., Van Leeuwen T.N. & Sivertsen G. (2013), The effect of booming countries on changes in the Relative Specialization Index (RSI) on country level , Proceedings of the 14th Conference of the International Society for Scientometrics and Informetrics. 654-663.
- Van Leeuwen T.N. & Wouters P.F. (2013), Analysis of journal impact factor research in time: Development of a specialty?, Proceedings of the 14th Conference of the International Society for Scientometrics and Informetrics. 66-77.
- Costas Comesana R. & Leeuwen T.N. van (2012), Approaching the "reward triangle": general analysis of the presence of funding acknowledgments and "peer interactive communication" in scientific publications, Journal of the American Society for Information Science and Technology 63(8): 1647-1661.
- Waltman L.R., Calero-Medina C.M., Kosten J., Noyons E.C.M., Tijssen R.J.W., Van Eck N.J.P., Leeuwen T.N. van, Raan A.F.J. van, Visser M.S. & Wouters P. (2012), The Leiden Ranking 2011/2012: Data collection, indicators, and interpretation, Journal of the American Society for Information Science and Technology 63(12): 2419-2432.
- Costas Comesana R., Leeuwen T.N. van & Bordons M. (2012), Referencing patterns of individual researchers: do top scientists rely on more extensive information sources?, Journal of the American Society for Information Science and Technology 63(12): 2433-2450.
- Leeuwen T.N. van & Moed H.F. (2012), Funding decisions, peer review and scientific excellence in physical sciences, chemistry and geosciences, Research Evaluation 21(3): 189-198.
- Waltman L.R., Calero Medina C.M., Kosten J., Noyons E.C.M., Tijssen R.J.W., Van Eck N.J.P., Leeuwen T.N. van, Raan A.F.J. van, Visser M.S. & Wouters P. (2012), The Leiden Ranking 2011/2012: Data collection, indicators, and interpretation: Centre for Science and Technology Studies, Leiden University.
- Leeuwen T.N. van & Calero Medina C.M. (2012), Redefining the field of economics: Improving field normalization for the application of bibliometric techniques in the field of economics, Research Evaluation 21: 61-70.
- Leeuwen T.N. van, Costas R., Calero Medina C.M. & Visser M.S. (2012), The role of editorial material in bibliometric research performance assessments, Proceedings of the 17th International Conference on Science and Technology Indicators, Montreal, Canada. 17th International Conference on Science and Technology Indicators 511-522.
- Waltman L.R., Van Eck N.J.P., Van Leeuwen T.N. & Visser M.S. (2012), Some modifications to the SNIP journal impact indicator: Centre for Science and Technology Studies, Leiden University.
- Nederhof Anton J., Leeuwen T.N. van & Clancy P. (2012), Calibration of bibliometric indicators in space exploration research: a comparison of citation impact measurement of the space and ground-based life and physical sciences, Research Evaluation 21(1): 79-85.
- Calero Medina C.M. & Leeuwen T.N. van (2012), Seed journal citation network maps: A method based on network theory, Journal of the American Society for Information Science and Technology 63(6): 1226-1234.
- Leeuwen T.N. van (2012), Discussing some basic critique on Journal Impact Factors: Revision of earlier comments, Scientometrics 92: 443-455.
- Waltman L., Calero-Medina C.M., Kosten J., Noyons E.C.M., Tijssen R.J.W., Van Eck N.J., Van Leeuwen T.N., Van Raan A.F.J., Visser M.S. & Wouters P.F. (2012), The Leiden Ranking 2011/2012: Data collection, indicators, and interpretation, Proceedings of the 17th International Conference on Science and Technology Indicators. 791-802.
- Costas R. & Van Leeuwen T.N. (2012), New indicators based on the 'Funding Acknowledgment' information in the Web of Science: analysis of the effect of peer review over the impact of scientific journals, Proceedings of the 17th International Conference on Science and Technology Indicators, Montreal, Canada. 17th International Conference on Science and Technology Indicators, Montreal, Canada 193-205.
- Den Hertog P., Jager C.J., Te Velde R., Veldkamp J., Sivertsen G., Aksnes D., Van Leeuwen T.N. & Van Wijk E. (2012), WTI2 wetenschaps- en technologie & innovatie indicatoren: WTI2 Consortium.
- Costas R., Leeuwen T.N. van & Raan A.F.J. van (2011), The "Mendel syndrome" in science: durability of scientific literature and its effects on bibliometric analysis of individual scientists, Scientometrics 89(1): 177-205.
- Zuccala A.A. & Leeuwen T.N. van (2011), Book Reviews in Humanities Research Evaluations, Journal of the American Society for Information Science and Technology 62: 1979-1991.
- Raan A.F.J. van, Leeuwen T.N. van & Visser M.S. (2011), Severe language effect in university rankings: particularly Germany and France are wronged in citation-based rankings, Scientometrics 88(2): 495-498.
- Costas Comesana R., Van Leeuwen T.N. & Bordons M. (2011), Referencing patterns among individual researchers: study of the use of scientific literature from a micro-level perspective. Noyons E., Ngulube P. & Leta J. (Eds.), Proceedings of the 13th International Conference of the International Society for Scientometrics and Informetrics. Proceedings of the 13th Conference of the International Society for Scientometrics and Informetrics, Durban, South Africa, July 4-7, 2011. PROCEEDINGS OF ISSI 2011: THE 13TH CONFERENCE OF THE INTERNATIONAL SOCIETY FOR SCIENTOMETRICS AND INFORMETRICS, VOLS 1 AND 2 no. 2011 163-174.
- Zuccala A.A. & Van Leeuwen T.N. (2011), Book reviews in humanities research evaluations: Centre for Science and Technology Studies, Leiden University.
- Raan A.F.J. van, Leeuwen T.N. van & Visser M.S. (2011), Non-English papers decrease rankings, 469(7328): 34.
- Waltman L.R., Van Eck N.J.P., Leeuwen T.N. van, Visser M.S. & Raan A.F.J. van (2011), On the correlation between bibliometric indicators and peer review: Reply to Opthof and Leydesdorff, Scientometrics 88(3): 1017-1022.
- Van Eyk H.J., Hooiveld H.M., Van Leeuwen T.N., Van der Wurff L.J., De Craen A.J.M. & Dekker F.W. (2011), Scientific output of Dutch medical students, Tijdschrift voor Medisch Onderwijs 30(3): 72-79.
- Waltman L.R., Van Eck N.J.P., Leeuwen T.N. van, Visser M.S. & Raan A.F.J. van (2011), Towards a new crown indicator: Some theoretical considerations, Journal of Informetrics 5(1): 37-47.
- Waltman L.R., Van Eck N.J.P., Leeuwen T.N. van, Visser M.S. & Raan A.F.J. van (2011), Towards a new crown indicator: An empirical analysis, Scientometrics 87(3): 467-481.
- Zuccala A.A. & Van Leeuwen T.N. (2011), Book Reviews in Humanities Research Evaluations, Proceedings of the 13th Conference of the International Society for Scientometrics and Informetrics. Proceedings of the 13th Conference of the International Society for Scientometrics and Informetrics, Durban, South Africa, July 4-7, 2011..
- Zuccala A. & Leeuwen T.N. van (2011), Book Reviews in Humanities Research Evaluations, Proceedings of the 13th Conference of the International Society of Scientometrics and Informetrics. 936-941.
- Raan A.F.J. van, Leeuwen T.N. van, Visser M.S., Van Eck N.J.P. & Waltman L.R. (2010), Rivals for the crown: Reply to Opthof and Leydesdorff. Leiden: SW Centrum Wetensch. & Techn. Studies (CWTS).
- Costas Comesana R., Leeuwen T.N. van & Bordons M. (2010), Self-citations at the meso and individual levels: effects of different calculation methods, Scientometrics 82(3): 517-537.
- Nederhof Anton J., Leeuwen T.N. van & Raan A.F.J. van (2010), Highly cited non-journal publications in political science, economics and psychology: a first exploration, Scientometrics 83(2): 363-374.
- Tijssen R.J.W., Nederhof Anton J., Van Leeuwen T.N., Hollanders H., Kanerva M. & Van den Berg P. (2010), Wetenschaps- en Technologie -Indicatoren 2010: Nederlands Observatorium van Wetenschap en Technologie (NOWT).
- Costas Comesana R., Leeuwen T.N. van & Raan A.F.J. van (2010), Is scientific literature subject to a 'sell-by-date'? : A general methodology to analyze the 'durability' of scientific documents, Journal of the American Society for Information Science and Technology 61(2): 329-339.
- Raan A.F.J. van, Leeuwen T.N. van, Visser M.S., Van Eck N.J.P. & Waltman L.R. (2010), Rivals for the crown: Reply to Opthof and Leydesdorff, Journal of Informetrics 4(3): 431-435.
- Costas Comesana R., Leeuwen T.N. van & Bordons M. (2010), A bibliometric classificatory approach for the study and assessment of research performance at the individual level: the effects of age on productivity and impact, Journal of the American Society for Information Science and Technology 61(8): 1564-1581.
- Eyk H.J. van, Hooiveld M.H.W., Leeuwen T.N. van, Wurff L.J van der, Craen A.J.M. de & Dekker F.W. (2010), Scientific output of Dutch medical students, Medical Teacher 32(3): 231-235.
- Van der Velde A.E., Van Leeuwen T.N., Van Welie S.D., Stam J.C.G. & Klaassen A.B.M. (2010), De kwaliteit van het cardiovasculair wetenschappelijk onderzoek in Nederland: De toegevoegde waarde van de Nederlandse Hartstichting, Nederlands Tijdschrift voor Geneeskunde 154: A803.
- Costas Comesana R., Bordons M., Leeuwen T.N. van & Raan A.F.J. van (2009), Scaling rules in the science system: influence of field-specific citation characteristics on the impact of individual researchers, Journal of the American Society for Information Science and Technology 60(4): 740-753.
- Leeuwen T.N. van (2009), Strength and weakness of national science systems: A bibliometric analysis through cooperation patterns, Scientometrics 79(2): 389-408.
- Van Leeuwen T.N. & Calero Medina C.M. (2009), Redefining the field of economics: Improving field normalization for the application of bibliometric techniques in the field of economics, 12th International Conference on Scientometrics and Informetrics. ISSI 2009. Rio de Janeiro: BIREME/PAHO/WHO.
- Costas Comesana R., Leeuwen T.N. van & Raan A.F.J. van (2009), Development of a general methodology for the analysis of the "durability" of scientific documents. Larsen B. & Leta J. (Eds.), Proceedings of the 12th international conference on scientometrics and informetrics. ISSI 2009 no. 2. Rio de Janeiro: BIREME/PAHO/WHO/Federal University of Rio de Janeiro . 918-919.
- Leeuwen T.N. van & Calero Medina C. (2009), Redefining the Field of Economics: Improving Field Normalization for the Application of Bibliometric Techniques in the Field of Economics, Proceedings of the 12th International Conference on Scientometrics and Informetrics. . PROCEEDINGS OF ISSI 2011: THE 13TH CONFERENCE OF THE INTERNATIONAL SOCIETY FOR SCIENTOMETRICS AND INFORMETRICS, VOLS 1 AND 2 410-420.
- Tijssen R.J.W., Leeuwen T.N. van & Van Wijk E. (2009), Benchmarking university-industry research cooperation worldwide: performance measurements and indicators based on co-authorship data for the world's largest universities, Research Evaluation 18(1): 13-24.
- Leeuwen T.N. van (2009), Using bibliometrics to support the procurement of NIHR biomedical research centres in England, Research Evaluation 18(1): 71-82.
- Tijssen R.J.W., Nederhof A.J. & Van Leeuwen T.N. (2008), Wetenschaps- en Technologie -Indicatoren 2008: Nederlands Observatorium van Wetenschap en Technologie (NOWT).
- Leeuwen T.N. van (2008), Testing the validity of the Hirsch-index for research assessment purposes, Research Evaluation 17(2): 157-160.
- Nederhof Anton J., Van Leeuwen T.N. & Clancy P. (2008), Boom or bust in space exploration research: A methodological study of bibliometric monitoring and policy implications. Gorraiz J. & Schiebel E. (Eds.), Excellence and emergence. A new challenge for the combination of quantitative and qualitative approaches. . Vienna 109-111.
- Van Leeuwen T.N. (10 June 2008), Publish or Perish. Presentatie van de 3TU studie voor het CvB en de verzamelde Decanen. Eindhoven. [lecture].
- Lambers Heerspink H.J., Knol M.J., Tijssen R.J.W., Leeuwen T.N. van, Grobbee D.E. & Zeeuw D. de (2008), Is the randomised controlled drug trial in Europe lagging behind the US?, British Journal of Clinical Pharmacology 66: 774-790.
- Van Leeuwen T.N. (21 October 2008), Results of the bibliometric study on the VUmc research output. Presentatie van de resultaten van de analyse van het VUmc voor decaan & instituutsdirecteuren. Amsterdam. [lecture].
- Van Leeuwen T.N. (27 November 2008), Bibliometric analysis on Dublin City University 1997-2006. Presentatie van de resultaten en methoden & technieken voor de DCU Deans & Heads of Schools. Dublin. [lecture].
- Tijssen Robert J.W. & Van Leeuwen Thed.N. (2007), Research cooperation within Europe: Bibliometric views of geographical trends and integration processes, Proceedings of the 11th Conference of the International Society of Scientometrics and Informetrics. . Proceedings of ISSI 2007: 11th International Conference of the International Society for Scientometrics and Informetrics, Vols I and II 740-744.
- Calero Medina C.M., Leeuwen T.N. van & Tijssen R.J.W. (2007), Research cooperation within the bio-pharmaceutical industry: Network analyses of co-publications within and between firms, Scientometrics 71(1): 87-99.
- Leeuwen T.N. van (2007), Modelling of bibliometric approaches and importance of output verification in research performance assessment, Research Evaluation 16(2): 93-105.
- Leeuwen T.N. van, Wurff L.J van der & Craen A.J.M. de (2007), Classification of research letters in general medical journals and its consequences in bibliometric research evaluation procresses, Research Evaluation 16: 59-63.
- Leeuwen T.N. van (2007), The application of bibliometric analyses in the evaluation of social science research. Who benefits from it, and why it is still feasible, Scientometrics 66: 133-154.
- Dekker F.W., De Craen A.J.M. & Van Leeuwen T.N. (14 November 2007), Bruikbaarheid van een bibliometrische maat als kwaliteits-indicator voor het onderwijs wetenschappelijke vorming aan studenten geneeskunde. Presentatie op de NVMO. Egmond aan Zee. [lecture].
- Van Leeuwen Thed N. & Tijssen Robert J.W. (2007), Strength and weakness of national science systems. A bibliometric analysis through cooperation patterns, Proceedings of the 11th Conference of the International Society for Scientometrics and Informetrics. . Proceedings of ISSI 2007: 11th International Conference of the International Society for Scientometrics and Informetrics, Vols I and II 469-479.
- Tijssen R.J.W. & Leeuwen T.N. van (2006), Measuring impacts of academic science on industrial research: A citation-based approach, Scientometrics 66: 55-69.
- Looy B. van, Debackere K., Callaert C., Tijssen R.J.W. & Leeuwen T.N. van (2006), Scientific capabilities and technological performance of national innovation systems: An exploration of emerging industrial relevant research domains, Scientometrics 66: 295-310.
- Tijssen R.J.W., Mouton J., Leeuwen T.N. van & Boshoff N. (2006), How relevant are local scholarly journals in global science? A case study of South Africa, Research Evaluation 15(3): 163-174.
- Tijssen R.J.W., Hollanders H., Van Leeuwen T.N. & Nederhof Anton J. (2005), Wetenschaps- en Technologie-Indicatoren 2005: Nederlands Observatorium van Wetenschap en Technologie (NOWT).
- Calero C., Leeuwen T.N. van & Tijssen R.J.W. (2005), Research networks of pharmaceutical firms: Geographical patterns of research collaboration within and between firms, Proceedings of the 10th International Conference of the International Society for Scientometrics and Informetrics. . ISSI 2005: Proceedings of the 10th International Conference of the International Society for Scientometrics and Informetrics, Vols 1 and 2 310-315.
- Leeuwen T.N. van & Moed H.F. (2005), Characteristics of Journal Impact Factors: The effects of uncitedness and citation distribution on the understanding of journal impact factors, Scientometrics 63: 357-371.
- Van Looy B.K., Debackere K., Callaert J., Tijssen R.J.W. & Van Leeuwen T.N. (2004), National scientific capabilities and technological performance: An exploration of emerging industrial relevant research domains, Proceedings of the 2004 S&T Indicators Conference, Leiden, The Netherlands. 178-188.
- Van Leeuwen T.N. (19 May 2004), Second generation bibliometric indicators. The improvement of existing and development of new bibliometric indicators for research and journal performance assessment procedures (Dissertatie, Faculty of Social and Behavioural Sciences, Leiden University): Leiden University. Supervisor(s): Raan A.F.J. van.
- Van Leeuwen T.N. (2004), Descriptive versus evaluative bibliometrics. In: Moed H.F., Glanzel W. & Schmoch U. (Eds.), Handbook of Quantitative Science and Technology Research: The use of publication and patent statistics in studies on S&T Systems. Dordrecht: Kluwer Academic Publishers. 373-388.
- Van Leeuwen T.N. (19 May 2004), Second generation bibliometric indicators (Dissertatie, Leiden University). Supervisor(s): Raan A.F.J. van.
- Van Leeuwen T.N. & Visser M.S. (2004), Results of the bibliometric study on Dutch genomics research. Leiden: CWTS BV.
- Leeuwen T.N. van (2004), Descriptive versus evaluative bibliometrics. In: , Handbook of Quantitative Science and Technology Research. The use of publication and patent statistics in studies of S&T systems 373-389.
- Rinia E.J., Van Leeuwen T.N., Kouw L.R. & Van Raan A.F.J. (2003), Can bibliometrics contribute to the study of interdisciplinary influence: A case study of physics, Proceedings of the 9th Conference of the International Society for Scientometrics and Informetrics. . Beijing 341-349.
- Raan A.F.J. van, Visser M.S., Leeuwen T.N. van & Van Wijk E. (2003), Bibliometric analysis of Psychotherapy Research: Performance assessment and position in the journal landscape, Psychotherapy Research 13(4): 511-528.
- Leeuwen T.N. van, Visser M.S., Moed H.F., Nederhof Anton J. & Raan A.F.J. van (2003), The Holy Grail of science policy: Exploring and combining bibliometric tools in search of scientific excellence, Scientometrics 57: 257-280.
- Tijssen R.J.W., Hollanders H., Van Leeuwen T.N. & Nederhof A.J. (2003), Wetenschaps- en Technologie -Indicatoren 2003: Nederlands Observatorium van Wetenschap en Technologie (NOWT).
- Tijssen R.J.W., Van Leeuwen T.N., Luo Y.-L., Hung W.C., Tsai M.H., Chang L.D., Hsiao Y.P. & Chen H.L. (2003), Macro level bibliometric analysis of Taiwanese Science 1995-2001: Science and Technology Information Center, National Research Council of Taiwan.
- Rinia E.J., Leeuwen T.N. van, Bruins E.E.W., Vuren H.G. van & Raan A.F.J. van (2002), Measuring knowledge transfer between fields of science, Scientometrics 54(3): 347-362.
- Rinia E.J., Leeuwen T.N. van & Raan A.F.J. van (2002), Impact measures of inderdisciplinary research in physics, Scientometrics 53(2): 241-248.
- Leeuwen T.N. van & Moed H.F. (2002), Development and application of journal impact measures in the Dutch science system, Scientometrics 53(2): 249-266.
- Tijssen R.J.W., Van Leeuwen T.N. & Van Raan A.F.J. (2002), Mapping the scientific performance of German medical research. An international comparative bibliometric study.
- Tijssen R.J.W., Visser M.S. & Leeuwen T.N. van (2002), Benchmarking international scientific excellence: Are highly cited research papers an appropriate frame of reference?, Scientometrics 54(3): 381-397.
- Raan A.F.J. van & Leeuwen T.N. van (2002), Assessment of the scientific basis of interdisciplinary, applied research. Application of bibliometric methods in Nutrition and Food Research, 31(4): 611-632.
- Van Leeuwen T.N. & Van Raan A.F.J. (2002), Wise Men’s Heritage. Bibliometric study of the research funded by the Netherlands Epilepsy Foundation (NEF) 1981-2000: National Epilepsy Fund.
- Rinia E.J., Leeuwen T.N. van, Bruins E.E.W., Vuren H.G. van & Raan A.F.J. van (2001), Measuring knowledge transfer between fields of science, Proceedings of the 8th Conference of the International Society for Scientometrics and Informetrics. . Proceedings of the 8th International Conference on Scientometrics and Informetrics, Vols 1 and 2 - ISSI 597-605.
- Tijssen R.J.W., Visser M.S. & Leeuwen T.N. van (2001), Searching for scientific excellence: Scientometric measurements and citation analyses of national research systems, Proceedings of the 8th Conference of the International Society for Scientometrics and Informetrics. . Proceedings of the 8th International Conference on Scientometrics and Informetrics, Vols 1 and 2 - ISSI 675-689.
- Van Leeuwen T.N. & Moed H.R. (2001), Overview of the development and application of journal impact measures within the dutch science system, Proceedings of the 8th Conference of the International Society for Scientometrics and Informetrics. . Proceedings of the 8th International Conference on Scientometrics and Informetrics, Vols 1 and 2 - ISSI 19-20.
- Leeuwen T. N. van, Moed H.F., Tijssen R.J.W., Visser M.S. & Raan A.F.J. van (2001), Language biases in the coverage of the Science Citation Index and its consequences for international comparisons of national research performance, Scientometrics 51(1): 335-346.
- Leeuwen T.N. van, Wurff L.J. van der & Raan A.F.J. van (2001), The use of combined bibliometric methods in research funding policy, Research Evaluation 10(3): 195-201.
- Rinia E.J., Leeuwen T.N. van, Vuren H.G. van & Raan A.F.J. van (2001), Impact measures of interdisciplinary research programs in physics, Proceedings of the 8th Conference of the International Society for Scientometrics and Informetrics. . Proceedings of the 8th International Conference on Scientometrics and Informetrics, Vols 1 and 2 - ISSI 10-11.
- Leeuwen T.N. van & Moed H.F. (2001), Development and application of new journal impact measures, Cortex 37(4): 607-610.
- Van Raan A.F.J., Leeuwen T.N. van & Visser M.S. (2001), Bibliometrics – Monitoring emerging fields A bibliometric methodology for exploring interdisciplinary, 'unorthodox' fields of science. A case study of environmental medicine. In: Maasen S. & Winterhager M. (Eds.), Science Studies. Probing the dynamics of scientific knowledge. 87-122.
- Rinia E.J., Leeuwen T.N. van, Bruins E.E.W., Vuren H.G. van & Raan A.F.J. van (2001), Citation delay in interdisciplinary knowledge exchange, Scientometrics 51(1): 293-309.
- Rinia E.J., Leeuwen T.N. van, Vuren H.G. van & Raan A.F.J. van (2001), Influence of interdisciplinarity on peer-review and bibliometric evaluations in physics research, 30(3): 357-361.
- Leeuwen T.N. van & Tijssen R.J.W. (2000), Interdisciplinary dynamics of modern science: analysis of cross-disciplinary citation flows, Research Evaluation 9(3): 183-187.
- Leeuwen T.N. van, Moed H.F., Tijssen R.J.W., Visser M.S. & Raan A.F.J. van (2000), First evidence of serious language-bias in the use of citation analysis for the evaluation of national science systems, Research Evaluation 9(2): 155-156.
- Tijssen R.J.W., Buter R.K. & Leeuwen T.N. van (2000), Technological relevance of science: An assessment of citation linkages between patents and research papers, Scientometrics 47(2): 389-412.
- Tijssen R.J.W., Van Leeuwen T.N., Hollanders H. & Verspagen B. (2000), Wetenschaps- en Technologie -Indicatoren 2000: Nederlands Observatorium van Wetenschap en Technologie (NOWT).
- Nederhof A.J., Van Leeuwen T.N. & Visser M.S. (2000), Bibliometric profiles of academic psychology research in the Netherlands. Leiden: CWTS.
- Moed H.F., Leeuwen T.N. van & Reedijk J. (1999), Towards appropriate indicators of journal impact, Proceedings of the 7th Conference of the International Society for Scientometrics and Informetrics. Lecture international, 7th Conference of the International Society for Scientometrics and Informetrics (ISSI). Proceedings of the 7th Conference of the International Society for Scientometrics and Informetrics: Universidad de Colima . 341-354.
- Leeuwen T.N. van, Moed H.F. & Reedijk J. (1999), Critical comments on Institute for Scientific information impact factors: a sample of inorganic molecular chemistry journals, Journal of Information Science 25(6): 489-498.
- Nederhof A.J., Van Leeuwen T.N., Visser M.S. & Van der Wurff L.J. (1999), Bibliometric profiles of academic veterinary and animal sciences research in the Netherlands. In: Meijerink M.H. (Ed.), VSNU, Veterinary and animal sciences. Utrecht: VSNU. 51-91.
- Moed H.F., Van Leeuwen T.N. & Visser M.S. (1999), Trends in publications output and impact of universities in the Netherlands, Research Evaluation 8(1): 60-67.
- Moed H.F., Leeuwen T.N. van & Reedijk J. (1999), Towards appropriate indicators of journal impact, Scientometrics 46(3): 575-589.
- Moed H.F., Leeuwen T.N. & Visser M.S. (1999), Trends in publication output and impact of universities in the Netherlands, Research Evaluation 8(1): 60-67.
- Nederhof A.J., Leeuwen T.N. van & Visser M.S. (1999), Bibliometric profiles of academic biology research in the Netherlands, 1988-1997. In: Meijerink M.H. (Ed.), VSNU, Biology. Utrecht: VSNU. 141-186.
- Tijssen R.J.W., Van Leeuwen T.N., Verspagen B. & Hollanders H. (1998), Wetenschaps- en Technologie -Indicatoren 1998: Nederlands Observatorium van Wetenschap en Technologie (NOWT).
- Nederhof A.J., Van Leeuwen T.N. & Visser M.S. (1998), A Bibliometric analysis of the Faculty of Medicine, University of Groningen: a decade of research. Leiden: Centre for Science and Technology Studies (CWTS).
- Nederhof A.J., Van Leeuwen T.N. & Visser M.S. (1998), A bibliometric analysis of the Netherlands School of Primery Care Research (CaRe). Leiden: Centre for Science and Technology Studies (CWTS).
- Rinia E.J., Leeuwen T.N. van, Vuren H.G. van & Raan A.F.J. van (1998), Comparative analysis of a set of bibliometric indicators and central peer review criteria - Evaluation of condensed matter physics in the Netherlands, 27(1): 95-107.
- Moed H.F., Leeuwen T.N. van & Reedijk J. (1998), A new classification system to describe the ageing of scientific journals and their impact factors, Journal of Documentation 54(4): 387-419.
- Nederhof A.J., Van Leeuwen T.N. & Visser M.S. (1998), A bibliometric study of natural and life sciences, University of Utrecht (1986-1995). Leiden: Centre for Science and Technology Studies (CWTS).
- Nederhof A.J., Van Leeuwen T.N. & Visser M.S. (1997), A comparative bibliometric study of the Kurt Lewin Institute (KLI). Leiden: Centre for Science and Technology Studies (CWTS).
- Nederhof A.J., Van Leeuwen T.N. & Visser M.S. (1997), A comparative bibliometric study of ALIFI (1986-1995). Leiden: Centre for Science and Technology Studies (CWTS).
- Rinia E.J., Van Vuren H.G., Van Leeuwen T.N. & Van Raan A.F.J. (1997), Scientometric indicators and peer evaluations: condensed matter physics in the Netherlands, Proceedings of the 6th Conference of the International Society for Scientometrics and Informetrics. . Jeruzalem 361-371.
- Nederhof A.J., Van Leeuwen T.N. & Visser M.S. (1997), A bibliometric study of the Faculty of Mathematics and Natural Sciences (RUG). Leiden: Centre for Science and Technology Studies (CWTS).
- Tijssen R.J.W., Van Leeuwen T.N., Verspagen B. & Slabbers M. (1996), Wetenschaps- en Technologie -Indicatoren 1996: Nederlands Observatorium van Wetenschap en Technologie (NOWT).
- Moed H.F., Leeuwen T.N. van & Reedijk J. (1996), A critical analysis of the journal impact factors of Angewandte Chemie and the Journal of the American Chemical Society - Inaccuracies in published impact factors based on overall citations only, Scientometrics 37(1): 105-116.
- Moed H.F. & Leeuwen T.N. van (1996), Impact factors can mislead, 381(6579): 186-186.
- Tijssen R.J.W., Leeuwen T.N. van & Korevaar J.C. (1996), Scientific publication activity of industry in the Netherlands, Research Evaluation 6(2): 105-119.
- Moed H.F., Bruin R.E. de & Leeuwen T.N. van (1995), New bibliometric tools for the assessment of national research performance: Database description, overview of indicators and first applications, Scientometrics 33(3): 381-422.
- Moed H.F. & Leeuwen T.N. van (1995), Improving the accuracy of institute for scientific information's journal impact factors, Journal of the American Society for Information Science 46(6): 461-467.
- Tijssen R.J.W. & Leeuwen T.N. van (1995), On generalising scientometric journal mapping beyond ISI's journal and citation databases, Scientometrics 33(1): 93-116.
- Tijssen R.J.W., Van Leeuwen T.N., Verspagen B. & Slabbers M. (1994), Wetenschaps- en Technologie -Indicatoren 1994: Nederlands Observatorium van Wetenschap en Technologie (NOWT).
- Van Leeuwen T.N. & Tijssen R.J.W. (1993), Assessing Multidisciplinary Area's of Science and Technology - A synthetic Bibliometric Study of Dutch Nuclear-Energy Research, Scientometrics 26(1): 115-133.