LW
Ludo Waltman
cs.DLphysics.soc-phBibliometricscs.SIScience and Technology Studiesphysics.data-anJournal Impact FactorLibrary and Information Sciencepeer reviewscholarly publishing
On Valency
published · living versionsW_hdzseerr·v1 · currentpublished
Guidance List for repOrting Bibliometric AnaLyses (GLOBAL): A Reporting Guideline Informed by a Two-Round Modified Delphi Study
with Jeremy Y. Ng, Henry Liu, Mehvish Masood, Niveen Syed +22
1 version
W_ghq23p45·v1published
Preprints & journals
90 papers in the corpus · 2009–2026Manuscript peer review lacks an empirically derived definition: a scoping review of 139 sources identifies 37 characteristics.42863804 · Masood, Mehvish, Tai, Ka Hin, Soto Rizzato, Julia et al.2026 · 0 citationsJournal of clinical epidemiology. 2026:112550
Defining Manuscript Peer Review: An International Delphi Consensus Study10.64898/2026.10.05.26364760v1 · Massod, M., Tai, K. H., Rizzato, J. S. et al.2026 · 0 citationsmedRxiv
‘What does "fairness” mean for you?': Using data visualizations to promote interdisciplinary dialogue about key terms in AI Ethics.47f6j_v1 · David Moats, Francien Dechesne, Judit Varga et al.2026 · 0 citationsSocArXiv
Development of China’s international research collaboration network (2014–2023)bsjr4_v1 · Hui-Zhen Fu, Ludo Waltman2026 · 0 citationsSocArXiv
International mobility funding duration and academic career outcomes: A longitudinal study of the China Scholarship Council programmehyb6m_v1 · Qianqian Xie, Ludo Waltman, Xin Li et al.2026 · 0 citationsSocArXiv
Why is change in scholarly communication so hard to imagine? Findings from a stakeholder consultation for the cOAlition S proposal ‘Towards Responsible Publishing’p9vrt_v1 · Wolfgang Kaltenbrunner, Andrea Chiarelli, Andrea Reyes Elizondo et al.2026 · 0 citationsSocArXiv
Adoption of Preprinting Across Scientific Disciplines and Geographical Regions (1991-2023)xdwc4_v3 · Narmin Rzayeva, Stephen Pinfield, Ludo Waltman2025 · 2 citationsSocArXiv
Incentivising, excluding, and enduring: The policy dynamics of quantitative research assessment in Lithuania9yq38_v2 · Eleonora Dagiene, Vincent Larivière, Guus Dix et al.2024 · 0 citationsSocArXiv
Guidance for the Reporting of Bibliometric Analyses: A Scoping Review10.1101/2024.08.26.24312538v1 · Ng, J. Y., Liu, H., Masood, M. et al.2024 · 42 citationsmedRxiv
Which topics are best represented by science maps? An analysis of clustering effectiveness for citation and text similarity networks2406.06454v1 · Juan Pablo Bascur, Suzan Verberne, Nees Jan van Eck et al.2024 · 14 citationsarXiv
Recommendations for accelerating open preprint peer review to improve the culture of science.38421949 · Avissar-Whiting, Michele, Belliard, Frédérique, Bertozzi, Stefano M et al.2024 · 36 citationsPLoS biology. 2024;22(2):e3002502
A guide for social science journal editors on easing into open science.38360805 · Silverstein, Priya, Elman, Colin, Montoya, Amanda et al.2024 · 27 citationsResearch integrity and peer review. 2024;9(1):2
Preprint review services: Disrupting the scholarly communication landscape?8c6xm_v3 · Susana Oliveira Henriques, Narmin Rzayeva, Stephen Pinfield et al.2023 · 5 citationsSocArXiv
A comparison of citation-based clustering and topic modeling for science mapping2309.06160v3 · Qianqian Xie, Ludo Waltman, The Netherlands2023 · 16 citationsarXiv
The experiences of COVID-19 preprint authors: a survey of researchers about publishing and receiving feedback on their work during the pandemic.37637174 · Rzayeva, Narmin, Henriques, Susana Oliveira, Pinfield, Stephen et al.2023 · 16 citationsPeerJ. 2023;11:e15864
To Preprint or Not to Preprint: A Global Researcher Surveyk7reb_v1 · Rong Ni, Ludo Waltman2023 · 41 citationsSocArXiv
Making Problems: Interdisciplinary Collaboration and AI Ethicshgdmt_v1 · David Moats, Tjitske Holtrop, Nees Jan van Eck et al.2023 · 2 citationsSocArXiv
How to improve scientific peer review: Four schools of thought.38504796 · Waltman, Ludo, Kaltenbrunner, Wolfgang, Pinfield, Stephen et al.2024 · 71 citationsLearned publishing : journal of the Association of Learned and Professional Society Publishers. 2023;36(3):334-347
Causal foundations of bias, disparity and fairness2207.13665v3 · V.A. Traag, L. Waltman2022 · 19 citationsarXiv
Academic information retrieval using citation clusters: In-depth evaluation based on systematic reviews2207.03299v2 · Juan Pablo Bascur, Suzan Verberne, Nees Jan van Eck et al.2022 · 52 citationsarXiv
Innovations in peer review in scholarly publishing: a meta-summary.36879926 · Woods, Helen Buckley, Brumberg, Johanna, Kaltenbrunner, Wolfgang et al.2023 · 11 citationsWellcome open research. 2022;7:82
Funding Covid-19 research: Insights from an exploratory analysis using open data infrastructures2202.11639v2 · Alexis-Michel Mugabushaka, Nees Jan van Eck, Ludo Waltman2022 · 17 citationsarXiv
Innovating peer review, reconfiguring scholarly communication: An analytical overview of ongoing peer review innovation activities8hdxu_v1 · Wolfgang Kaltenbrunner, Stephen Pinfield, Ludo Waltman et al.2022 · 39 citationsSocArXiv
Investigating Disagreement in the Scientific Literature2107.14641v2 · Wout S. Lamers, Kevin Boyack, Vincent Lariviere et al.2021 · 36 citationsarXiv
A large-scale bibliometric analysis of global climate change research between 2001 and 20182107.08214v1 · Hui-Zhen Fu, Ludo Waltman2021 · 119 citationsarXiv
Gender differences in scientific careers: A large-scale bibliometric analysis2106.12624v1 · Hanjo Boekhout, Inge van der Weijden, Ludo Waltman2021 · 39 citationsarXiv
A scientometric overview of CORD-19.33411846 · Colavizza, Giovanni, Costas, Rodrigo, Traag, Vincent A et al.2021 · 104 citationsPloS one. 2021;16(1):e0244839
Correction to 'Intermediacy of publications'.33047069 · Šubelj, Lovro, Waltman, Ludo, Traag, Vincent et al.2020 · 0 citationsRoyal Society open science. 2020;7(9):201326
Large-scale comparison of bibliographic data sources: Scopus, Web of Science, Dimensions, Crossref, and Microsoft Academic2005.10732v2 · Martijn Visser, Nees Jan van Eck, Ludo Waltman2020 · 881 citationsarXiv
Use of the journal impact factor for assessing individual articles: Statistically flawed or not?33796272 · Waltman, Ludo, Traag, Vincent A2021 · 76 citationsF1000Research. 2020;9:366
Algorithmic labeling in hierarchical classifications of publications: Evaluation of bibliographic fields and term weighting approaches2004.08090v4 · Peter Sjog\aarde, Per Ahlgren, Ludo Waltman2020 · 10 citationsarXiv
Intermediacy of publications.32218924 · Šubelj, Lovro, Waltman, Ludo, Traag, Vincent et al.2020 · 16 citationsRoyal Society open science. 2020;7(1):190207
Accuracy of citation data in Web of Science and Scopus1906.07011v1 · Nees Jan van Eck, Ludo Waltman2019 · 71 citationsarXiv
Rethinking impact factors: better ways to judge a journal.31138924 · Wouters, Paul, Sugimoto, Cassidy R, Larivière, Vincent et al.2019 · 87 citationsNature. 2019;569(7758):621-623
A multi-dimensional framework for characterizing the citation impact of scientific publications1901.09663v4 · Yi Bu, Ludo Waltman, Yong Huang2019 · 9 citationsarXiv
A principled methodology for comparing relatedness measures for clustering publications1901.06815v2 · Ludo Waltman, Kevin W. Boyack, Giovanni Colavizza et al.2019 · 84 citationsarXiv
Systematic analysis of agreement between metrics and peer review in the UK REF1808.03491v2 · Vincent Traag, Ludo Waltman2018 · 64 citationsPalgrave communications (2019), 5(1), 29
Improving the evaluation of worldwide biomedical research output: classification method and standardised bibliometric indicators by disease.29866730 · van de Laar, Lissy, de Kruif, Thijs, Waltman, Ludo et al.2019 · 6 citationsBMJ open. 2018;8(6):e020818
Exploration of reproducibility issues in scientometric research Part 1: Direct reproducibility1804.05024v1 · Ludo Waltman, Sybille Hinze, Andrea Scharnhorst et al.2018 · 0 citationsarXiv
Exploration of Reproducibility Issues in Scientometric Research Part 2: Conceptual Reproducibility1804.05026v1 · Theresa Velden, Sybille Hinze, Andrea Scharnhorst et al.2018 · 1 citationarXiv
Analyzing the activities of visitors of the Leiden Ranking website1804.03869v2 · Nees Jan van Eck, Ludo Waltman2018 · 2 citationsarXiv
Science of science.29496846 · Fortunato, Santo, Bergstrom, Carl T, Börner, Katy et al.2018 · 1,493 citationsScience (New York, N.Y.). 2018;359(6379)
Field normalization of scientometric indicators1801.09985v1 · Ludo Waltman, Nees Jan van Eck2018 · 97 citationsarXiv
Characterizing in-text citations in scientific articles: A large-scale analysis1710.03094v1 · Kevin W. Boyack, Nees Jan van Eck, Giovanni Colavizza et al.2017 · 124 citationsarXiv
The Closer the Better: Similarity of Publication Pairs at Different Co-Citation Levels1707.03076v4 · Giovanni Colavizza, Kevin W. Boyack, Nees Jan van Eck et al.2017 · 30 citationsarXiv
Impact factors: Is the Nature Index at odds with DORA?28541321 · Waltman, Ludo, Traag, Vincent2017 · 2 citationsNature. 2017;545(7655):412
Use of the journal impact factor for assessing individual articles: Statistically flawed or not?1703.02334v3 · Ludo Waltman, Vincent A. Traag2017 · 40 citationsarXiv
Citation-based clustering of publications using CitNetExplorer and VOSviewer.28490825 · van Eck, Nees Jan, Waltman, Ludo2022 · 2,681 citationsScientometrics. 2017;111(2):1053-1070
Conceptual difficulties in the use of statistical inference in citation analysis1612.03285v1 · Ludo Waltman2016 · 14 citationsarXivon Valency
A Large-Scale Analysis of Impact Factor Biased Journal Self-Citations.27560807 · Chorus, Caspar, Waltman, Ludo2017 · 92 citationsPloS one. 2016;11(8):e0161021
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