Ludo Waltman

ORCID

Publication Activity (10 Years)

Years Active: 2005-2024
Publications (10 Years): 68

Top Venues

Publications

Juan Pablo Bascur, Suzan Verberne, Nees Jan van Eck, Ludo Waltman
Which topics are best represented by science maps? An analysis of clustering effectiveness for citation and text similarity networks. CoRR (2024)
Rong Ni, Ludo Waltman
To preprint or not to preprint: A global researcher survey. J. Assoc. Inf. Sci. Technol. 75 (6) (2024)
Juan Pablo Bascur, Suzan Verberne, Nees Jan van Eck, Ludo Waltman
Academic information retrieval using citation clusters: in-depth evaluation based on systematic reviews. Scientometrics 128 (5) (2023)
Ludo Waltman, Wolfgang Kaltenbrunner, Stephen Pinfield, Helen Buckley Woods
How to improve scientific peer review: Four schools of thought. Learn. Publ. 36 (3) (2023)
Giovanni Abramo, Isidro F. Aguillo, Dag W. Aksnes, Kevin W. Boyack, Quentin L. Burrell, Juan Miguel Campanario, Zaida Chinchilla-Rodríguez, Rodrigo Costas, Ciriaco Andrea D'Angelo, Anne-Wil Harzing, Hamid R. Jamali, Vincent Larivière, Loet Leydesdorff, Marc Luwel, Ben Martin, Philipp Mayr, Katherine W. McCain, Isabella Peters, Ismael Ràfols, Nicolás Robinson-García, Torben Schubert, Henry Small, Cassidy R. Sugimoto, Mike Thelwall, Peter van den Besselaar, Thed N. van Leeuwen, Ludo Waltman
Retraction of Predatory publishing in Scopus: evidence on cross-country differences lacks justification. Scientometrics 128 (2) (2023)
Qianqian Xie, Ludo Waltman
A comparison of citation-based clustering and topic modeling for science mapping. CoRR (2023)
Alexis-Michel Mugabushaka, Nees Jan van Eck, Ludo Waltman
Funding COVID-19 research: Insights from an exploratory analysis using open data infrastructures. Quant. Sci. Stud. 3 (3) (2022)
Vincent A. Traag, Ludo Waltman
Causal foundations of bias, disparity and fairness. CoRR (2022)
Juan Pablo Bascur, Suzan Verberne, Nees Jan van Eck, Ludo Waltman
Academic information retrieval using citation clusters: In-depth evaluation based on systematic reviews. CoRR (2022)
Ludo Waltman, Vincent Larivière
The challenges of scientometric studies of predatory publishing. Quant. Sci. Stud. 3 (3) (2022)
Alexis-Michel Mugabushaka, Nees Jan van Eck, Ludo Waltman
Funding Covid-19 research: Insights from an exploratory analysis using open data infrastructures. CoRR (2022)
Wolfgang Kaltenbrunner, Stephen Pinfield, Ludo Waltman, Helen Buckley Woods, Johanna Brumberg
Innovating peer review, reconfiguring scholarly communication: an analytical overview of ongoing peer review innovation activities. J. Documentation 78 (7) (2022)
Ludo Waltman
Understanding gender differences in science requires a diversity of perspectives, including controversial ones. Quant. Sci. Stud. 2 (1) (2021)
Peter Sjögårde, Per Ahlgren, Ludo Waltman
Algorithmic labeling in hierarchical classifications of publications: Evaluation of bibliographic fields and term weighting approaches. J. Assoc. Inf. Sci. Technol. 72 (7) (2021)
Hui-Zhen Fu, Ludo Waltman
A large-scale bibliometric analysis of global climate change research between 2001 and 2018. CoRR (2021)
Hanjo D. Boekhout, Inge van der Weijden, Ludo Waltman
Gender differences in scientific careers: A large-scale bibliometric analysis. CoRR (2021)
Martijn S. Visser, Nees Jan van Eck, Ludo Waltman
Large-scale comparison of bibliographic data sources: Scopus, Web of Science, Dimensions, Crossref, and Microsoft Academic. Quant. Sci. Stud. 2 (1) (2021)
Wout S. Lamers, Kevin W. Boyack, Vincent Larivière, Cassidy R. Sugimoto, Nees Jan van Eck, Ludo Waltman, Dakota S. Murray
Measuring Disagreement in Science. CoRR (2021)
Yi Bu, Ludo Waltman, Yong Huang
A multidimensional framework for characterizing the citation impact of scientific publications. Quant. Sci. Stud. 2 (1) (2021)
Ludo Waltman, Kevin W. Boyack, Giovanni Colavizza, Nees Jan van Eck
A principled methodology for comparing relatedness measures for clustering publications. Quant. Sci. Stud. 1 (2) (2020)
Ludo Waltman, Vincent Larivière, Stasa Milojevic, Cassidy R. Sugimoto
Opening science: The rebirth of a scholarly journal. Quant. Sci. Stud. 1 (1) (2020)
Ludo Waltman, Vincent Larivière
Special issue on bibliographic data sources. Quant. Sci. Stud. 1 (1) (2020)
Peter Sjögårde, Per Ahlgren, Ludo Waltman
Algorithmic labeling in hierarchical classifications of publications: Evaluation of bibliographic fields and term weighting approaches. CoRR (2020)
Juan Pablo Bascur, Suzan Verberne, Nees Jan van Eck, Ludo Waltman
Browsing Citation Clusters for Academic Literature Search: A Simulation Study with Systematic Reviews. BIR@ECIR (2020)
Martijn S. Visser, Nees Jan van Eck, Ludo Waltman
Large-scale comparison of bibliographic data sources: Scopus, Web of Science, Dimensions, Crossref, and Microsoft Academic. CoRR (2020)
Yi Bu, Ludo Waltman, Yong Huang
A multidimensional perspective on the citation impact of scientific publications. ISSI (2019)
Martijn S. Visser, Nees Jan van Eck, Ludo Waltman
Large-scale comparison of bibliographic data sources: Web of Science, Scopus, Dimensions, and Crossref. ISSI (2019)
Nees Jan van Eck, Ludo Waltman
Accuracy of citation data in Web of Science and Scopus. CoRR (2019)
Lovro Subelj, Ludo Waltman, Vincent A. Traag, Nees Jan van Eck
Intermediacy of publications. ISSI (2019)
Vincent A. Traag, Ludo Waltman
Persistence of journal hierarchy in open access publishing. ISSI (2019)
Ludo Waltman, Kevin W. Boyack, Giovanni Colavizza, Nees Jan van Eck
A principled methodology for comparing relatedness measures for clustering publications. CoRR (2019)
Yi Bu, Ludo Waltman, Yong Huang
A multidimensional perspective on the citation impact of scientific publications. CoRR (2019)
Wout S. Lamers, Nees Jan van Eck, Ludo Waltman
Variations in citation practices across the scientific landscape: Analysis based on a large full-text corpus. ISSI (2019)
Juan Pablo Bascur, Nees Jan van Eck, Ludo Waltman
An Interactive Visual Tool for Scientific Literature Search: Proposal and Algorithmic Specification. BIR@ECIR (2019)
Giovanni Colavizza, Massimo Franceschet, Vincent A. Traag, Ludo Waltman
Quantifying the long-term influence of scientific publications. ISSI (2019)
Dakota S. Murray, Wout Lamers, Kevin W. Boyack, Vincent Larivière, Cassidy R. Sugimoto, Nees Jan van Eck, Ludo Waltman
Measuring disagreement in science. ISSI (2019)
Nees Jan van Eck, Ludo Waltman
Analyzing the activities of visitors of the Leiden Ranking website. J. Data Inf. Sci. 3 (3) (2018)
Lovro Subelj, Ludo Waltman, Vincent A. Traag, Nees Jan van Eck
Intermediacy of publications. CoRR (2018)
Kevin W. Boyack, Nees Jan van Eck, Giovanni Colavizza, Ludo Waltman
Characterizing in-text citations in scientific articles: A large-scale analysis. J. Informetrics 12 (1) (2018)
Giovanni Colavizza, Kevin W. Boyack, Nees Jan van Eck, Ludo Waltman
The Closer the Better: Similarity of Publication Pairs at Different Cocitation Levels. J. Assoc. Inf. Sci. Technol. 69 (4) (2018)
Theresa Velden, Sybille Hinze, Andrea Scharnhorst, Jesper Wiborg Schneider, Ludo Waltman
Exploration of Reproducibility Issues in Scientometric Research Part 2: Conceptual Reproducibility. CoRR (2018)
Ludo Waltman, Sybille Hinze, Andrea Scharnhorst, Jesper Wiborg Schneider, Theresa Velden
Exploration of reproducibility issues in scientometric research Part 1: Direct reproducibility. CoRR (2018)
Ludo Waltman, Nees Jan van Eck
Field normalization of scientometric indicators. CoRR (2018)
Vincent A. Traag, Ludo Waltman, Nees Jan van Eck
From Louvain to Leiden: guaranteeing well-connected communities. CoRR (2018)
Vincent A. Traag, Ludo Waltman
Systematic analysis of agreement between metrics and peer review in the UK REF. CoRR (2018)
Nees Jan van Eck, Ludo Waltman
Analyzing the activities of visitors of the Leiden Ranking website. CoRR (2018)
Kevin W. Boyack, Nees Jan van Eck, Giovanni Colavizza, Ludo Waltman
Reference behavior in the full text of scientific articles: A large-scale analysis. ISSI (2017)
Ludo Waltman, Kevin W. Boyack, Giovanni Colavizza, Nees Jan van Eck
A principled methodology for comparing relatedness measures for clustering publications. ISSI (2017)
Giovanni Colavizza, Kevin W. Boyack, Nees Jan van Eck, Ludo Waltman
Exploring the Similarity of Articles Co-cited at Different Levels. ISSI (2017)
Nees Jan van Eck, Ludo Waltman
Citation-based clustering of publications using CitNetExplorer and VOSviewer. Scientometrics 111 (2) (2017)
Ludo Waltman
Special section on performance-based research funding systems. J. Informetrics 11 (3) (2017)
Kevin W. Boyack, Nees Jan van Eck, Giovanni Colavizza, Ludo Waltman
Characterizing in-text citations in scientific articles: A large-scale analysis. CoRR (2017)
Ludo Waltman, Vincent A. Traag
Use of the journal impact factor for assessing individual articles need not be wrong. CoRR (2017)
Giovanni Colavizza, Kevin W. Boyack, Nees Jan van Eck, Ludo Waltman
The Closer the Better: Similarity of Publication Pairs at Different Co-Citation Levels. CoRR (2017)
Nees Jan van Eck, Ludo Waltman, Min Song, Yoo Kyung Jeong
Using full-text data to create improved term maps. ISSI (2017)
Kevin W. Boyack, Wolfgang Glänzel, Jochen Gläser, Frank Havemann, Andrea Scharnhorst, Bart Thijs, Nees Jan van Eck, Theresa Velden, Ludo Waltman
Topic identification challenge. Scientometrics 111 (2) (2017)
Nees Jan van Eck, Ludo Waltman
Citation-based clustering of publications using CitNetExplorer and VOSviewer. CoRR (2017)
Nees Jan van Eck, Ludo Waltman
Accuracy of citation data in Web of Science and Scopus. ISSI (2017)
Ludo Waltman
Conceptual difficulties in the use of statistical inference in citation analysis. CoRR (2016)
Ludo Waltman
Special section on statistical inference in citation analysis. J. Informetrics 10 (4) (2016)
Antonio Perianes-Rodríguez, Ludo Waltman, Nees Jan van Eck
Constructing bibliometric networks: A comparison between full and fractional counting. J. Informetrics 10 (4) (2016)
Qi Wang, Ludo Waltman
Large-scale analysis of the accuracy of the journal classification systems of Web of Science and Scopus. J. Informetrics 10 (2) (2016)
Ludo Waltman, Nees Jan van Eck, Martijn S. Visser, Paul Wouters
The elephant in the room: The problem of quantifying productivity in evaluative scientometrics. CoRR (2016)
Antonio Perianes-Rodríguez, Ludo Waltman, Nees Jan van Eck
Constructing bibliometric networks: A comparison between full and fractional counting. CoRR (2016)
Ludo Waltman
A review of the literature on citation impact indicators. J. Informetrics 10 (2) (2016)
Ludo Waltman
Conceptual difficulties in the use of statistical inference in citation analysis. J. Informetrics 10 (4) (2016)
Ludo Waltman
Special section on size-independent indicators in citation analysis. J. Informetrics 10 (2) (2016)
Ludo Waltman, Nees Jan van Eck, Martijn S. Visser, Paul Wouters
The elephant in the room: The problem of quantifying productivity in evaluative scientometrics. J. Informetrics 10 (2) (2016)
Clara Stegehuis, Nelly Litvak, Ludo Waltman
Predicting the long-term citation impact of recent publications. CoRR (2015)
Ludo Waltman, Nees Jan van Eck
Field-Normalized Citation Impact Indicators and the Choice of an Appropriate Counting Method. ISSI (2015)
Ludo Waltman
A review of the literature on citation impact indicators. CoRR (2015)
Clara Stegehuis, Nelly Litvak, Ludo Waltman
Predicting the long-term citation impact of recent publications. J. Informetrics 9 (3) (2015)
Qi Wang, Ludo Waltman
Large-Scale Analysis of the Accuracy of the Journal Classification Systems of Web of Science and Scopus. CoRR (2015)
Ludo Waltman
Message from the new Editor-in-Chief. J. Informetrics 9 (1) (2015)
Ludo Waltman, Nees Jan van Eck
Field-normalized citation impact indicators and the choice of an appropriate counting method. J. Informetrics 9 (4) (2015)
Ludo Waltman, Nees Jan van Eck
Field-normalized citation impact indicators and the choice of an appropriate counting method. CoRR (2015)
Lovro Subelj, Nees Jan van Eck, Ludo Waltman
Clustering scientific publications based on citation relations: A systematic comparison of different methods. CoRR (2015)
Javier Ruiz-Castillo, Ludo Waltman
Field-normalized citation impact indicators using algorithmically constructed classification systems of science. J. Informetrics 9 (1) (2015)
Nees Jan van Eck, Ludo Waltman
CitNetExplorer: A new software tool for analyzing and visualizing citation networks. CoRR (2014)
Ludo Waltman, Rodrigo Costas
F1000 Recommendations as a Potential New Data Source for Research Evaluation: A Comparison With Citations. J. Assoc. Inf. Sci. Technol. 65 (3) (2014)
Per Ahlgren, Ludo Waltman
The correlation between citation-based and expert-based assessments of publication channels: SNIP and SJR vs. Norwegian quality assessments. J. Informetrics 8 (4) (2014)
Ludo Waltman, Anthony F. J. van Raan, Sue Smart
Exploring the relationship between the Engineering and Physical Sciences and the Health and Life Sciences by advanced bibliometric methods. CoRR (2014)
Nees Jan van Eck, Ludo Waltman
CitNetExplorer: A new software tool for analyzing and visualizing citation networks. J. Informetrics 8 (4) (2014)
Nees Jan van Eck, Ludo Waltman
Systematic Retrieval of Scientific Literature based on Citation Relations: Introducing the CitNetExplorer Tool. BIR@ECIR (2014)
Ludo Waltman, Nees Jan van Eck
A systematic empirical comparison of different approaches for normalizing citation impact indicators. J. Informetrics 7 (4) (2013)
Ludo Waltman, Nees Jan van Eck, Paul Wouters
Counting publications and citations: Is more always better? J. Informetrics 7 (3) (2013)
Ludo Waltman, Nees Jan van Eck
Source normalized indicators of citation impact: an overview of different approaches and an empirical comparison. Scientometrics 96 (3) (2013)
Ludo Waltman, Rodrigo Costas
F1000 recommendations as a new data source for research evaluation: A comparison with citations CoRR (2013)
Ludo Waltman, Nees Jan van Eck, Paul Wouters
Counting publications and citations: Is more always better? CoRR (2013)
Ludo Waltman, Nees Jan van Eck
A systematic empirical comparison of different approaches for normalizing citation impact indicators CoRR (2013)
Ludo Waltman, Nees Jan van Eck, Thed N. van Leeuwen, Martijn S. Visser
Some modifications to the SNIP journal impact indicator. J. Informetrics 7 (2) (2013)
Ludo Waltman, Nees Jan van Eck
A smart local moving algorithm for large-scale modularity-based community detection. CoRR (2013)
Ludo Waltman, Michael Schreiber
On the calculation of percentile-based bibliometric indicators. J. Assoc. Inf. Sci. Technol. 64 (2) (2013)
Ludo Waltman, Clara Calero-Medina, Joost Kosten, Ed C. M. Noyons, Robert J. W. Tijssen, Nees Jan van Eck, Thed N. van Leeuwen, Anthony F. J. van Raan, Martijn S. Visser, Paul Wouters
The Leiden Ranking 2011/2012: Data collection, indicators, and interpretation CoRR (2012)
Robert J. W. Tijssen, Ludo Waltman, Nees Jan van Eck
Research collaboration and the expanding science grid: Measuring globalization processes worldwide CoRR (2012)
Ludo Waltman, Nees Jan van Eck
The inconsistency of the h-index. J. Assoc. Inf. Sci. Technol. 63 (2) (2012)
Ludo Waltman, Nees Jan van Eck
A mathematical analysis of the long-run behavior of genetic algorithms for social modeling. Soft Comput. 16 (6) (2012)
Ludo Waltman, Nees Jan van Eck, Anthony F. J. van Raan
Universality of citation distributions revisited. J. Assoc. Inf. Sci. Technol. 63 (1) (2012)
Ludo Waltman, Clara Calero-Medina, Joost Kosten, Ed C. M. Noyons, Robert J. W. Tijssen, Nees Jan van Eck, Thed N. van Leeuwen, Anthony F. J. van Raan, Martijn S. Visser, Paul Wouters
The Leiden ranking 2011/2012: Data collection, indicators, and interpretation. J. Assoc. Inf. Sci. Technol. 63 (12) (2012)
Ludo Waltman, Nees Jan van Eck
A new methodology for constructing a publication-level classification system of science CoRR (2012)

Ludo Waltman.css-eqlu8i{font-size:small;padding-left:4px;}

Publication Activity (10 Years)

Top Topics

Top Venues

Ludo Waltman