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How to analyze percentile citation impact data meaningfully in bibliometrics: The statistical analysis of distributions, percentile rank classes, and top-cited papers

Lutz Bornmann
2013 Journal of the American Society for Information Science and Technology  
This study suggests how percentiles (and percentile rank classes) can be analyzed meaningfully for an evaluation study.  ...  According to current research in bibliometrics, percentiles (or percentile rank classes) are the most suitable method for normalizing the citation counts of individual publications in terms of the subject  ...  Acknowledgments The author wishes to thank Loet Leydesdorff, Rüdiger Mutz, Michael Schreiber, and Ludo Waltman for valuable discussions.  ... 
doi:10.1002/asi.22792 fatcat:a4jofjjyunh4jpzhkxpzryunkq

Professional and Citizen Bibliometrics: Complementarities and ambivalences in the development and use of indicators [article]

Loet Leydesdorff, Paul Wouters, Lutz Bornmann
2016 arXiv   pre-print
Bibliometric indicators such as journal impact factors, h-indices, and total citation counts are algorithmic artifacts that can be used in research evaluation and management.  ...  We distinguish four main stakeholders in these practices: (1) producers of bibliometric data and indicators; (2) bibliometricians who develop and test indicators; (3) research managers who apply the indicators  ...  Acknowledgement We wish to thank Ludo Waltman for comments on a previous draft and interesting suggestions.  ... 
arXiv:1609.04793v3 fatcat:wks7onzsljd6dbitpqseihwqsm

Professional and citizen bibliometrics: complementarities and ambivalences in the development and use of indicators—a state-of-the-art report

Loet Leydesdorff, Paul Wouters, Lutz Bornmann
2016 Scientometrics  
Bibliometric indicators such as journal impact factors, h-indices, and total citation counts are algorithmic artifacts that can be used in research evaluation and management.  ...  We distinguish four main stakeholders in these practices: (1) producers of bibliometric data and indicators; (2) bibliometricians who develop and test indicators; (3) research managers who apply the indicators  ...  Acknowledgments We wish to thank Ludo Waltman for comments on a previous draft and interesting suggestions.  ... 
doi:10.1007/s11192-016-2150-8 pmid:27942086 pmcid:PMC5124044 fatcat:j3r2etthlzh2vpsf3y43cidhaa

Normalisation of citation impact in economics

Lutz Bornmann, Klaus Wohlrabe
2019 Scientometrics  
the mean impact of similar papers published in the same economic subfield and publication year. (2) PP top 10 % is the share of papers that belong to the 10% most cited papers in a certain subfield and  ...  We used the PP top 10 % results for assigning the journals to four citation impact classes. Seventeen journals have been identified as outstandingly cited.  ...  The bibliometric data used in this paper are from an in-house database developed and maintained by the Max Planck Digital Library (MPDL, Munich) and derived from the Science Citation Index Expanded (SCI-E  ... 
doi:10.1007/s11192-019-03140-w fatcat:5nk6mvj64rgrra5zmfozxozyr4

The European Union, China, and the United States in the top-1% and top-10% layers of most-frequently cited publications: Competition and collaborations

Loet Leydesdorff, Caroline S. Wagner, Lutz Bornmann
2014 Journal of Informetrics  
the top-1% of all papers; China drops out of the competition for elite status; and the EU28 increased its share among the top-cited papers from 2000 to 2010.  ...  An analytical variant of the Web-of-Science (of Thomson Reuters) enables us to study the dynamics in the world publication system in terms of the field-normalized top-1% and top-10% most-frequently cited  ...  ceteris paribus, 10% of a nation's internationally co-authored Acknowledgement The data used in this paper is from a bibliometrics database developed and maintained by the Max Planck Digital Library  ... 
doi:10.1016/j.joi.2014.05.002 fatcat:fmo47alti5andixzu6pzosndym

Benefits of basic research from the Superfund Research Program

William A. Suk, Michelle L. Heacock, Brittany A. Trottier, Sara M. Amolegbe, Maureen D. Avakian, Danielle J. Carlin, Heather F. Henry, Adeline R. Lopez, Lesley A. Skalla
2020 Reviews on Environmental Health  
Documenting the benefits of these investments provides insight into how basic research is translated to real-world applications.  ...  It has informed the development of policies and interventions to reduce exposure to environmental contaminants to improve public health.  ...  Acknowledgments: The authors would like to thank Kim  ... 
doi:10.1515/reveh-2019-0104 pmid:32543458 fatcat:e75qo3nyhvajxgh2rqpqycpcrm

The information value of early career productivity in mathematics: a ROC analysis of prediction errors in bibliometricly informed decision making

Jonas Lindahl, Rickard Danell
2016 Scientometrics  
We used ROC analysis to evaluate a bibliometric indicator as a tool for binary decision making. The dataset consisted of 451 early career researchers in the mathematical sub-field of number theory.  ...  We investigated the effect of three different definitions of top performance groups-top 10, top 25, and top 50 %; the consequences of using different thresholds in the prediction models; and the added  ...  We investigated the added prediction value of information on publications in prestige journals and collaboration early in the career with multiple logistic regression and ROC analysis.  ... 
doi:10.1007/s11192-016-2097-9 pmid:27942088 pmcid:PMC5124050 fatcat:7dl64vyvhrcmjh4xqqmyrvszze

Are Female Scientists Less Inclined to Publish Alone? The Gender Solo Research Gap [article]

Marek Kwiek, Wojciech Roszka
2021 arXiv   pre-print
Our focus is on how male and female scientists of various biological ages, age groups, academic positions, and institutional types make use of, and benefit from, solo publishing.  ...  We tested the hypothesis that male and female scientists differ in their use of solo publishing, and we termed this difference the gender solo research gap.  ...  Acknowledgments We gratefully acknowledge the support of the Ministry of Education and Science through its Dialogue grant 0022/DLG/2019/10 (RESEARCH UNIVERSITIES).  ... 
arXiv:2101.03220v2 fatcat:h5kedahml5ajzcbnnnemduzg5m

Co-word Maps and Topic Modeling: A Comparison Using Small and Medium-Sized Corpora (n < 1000) [article]

Loet Leydesdorff, Adina Nerghes
2016 arXiv   pre-print
Induced by "big data," "topic modeling" has become an attractive alternative to mapping co-words in terms of co-occurrences and co-absences using network techniques.  ...  We return to the word/document matrix using first a single text with a strong argument ("The Leiden Manifesto") and then upscale to a sample of moderate size (n = 687) to study the pros and cons of the  ...  Acknowledgement We are grateful to Kasper Welbers and the three anonymous referees for comments on an earlier version of this paper.  ... 
arXiv:1511.03020v2 fatcat:pg4x2hacqzdzfkmgn3ogdthx5e

Co-word maps and topic modeling: A comparison using small and medium-sized corpora (N < 1,000)

Loet Leydesdorff, Adina Nerghes
2016 Journal of the Association for Information Science and Technology  
Co-word Maps and Topic Modeling: A Comparison using small and medium-sized corpora (N < 1,000) Leydesdorff, L.A.; Nerghes, A.  ...  Acknowledgement We are grateful to Kasper Welbers and the three anonymous referees for comments on an earlier version of this paper.  ...  4 impact data study leiden scientific global national comparison international approach 5 research university citation analysis case bibliometric web fields bibliometrics collaboration In our opinion,  ... 
doi:10.1002/asi.23740 fatcat:dqmxxzpdzzeb5dzcyc2t5gckyy

Statistical significance and effect sizes of differences among research universities at the level of nations and worldwide based on the leiden rankings

Loet Leydesdorff, Lutz Bornmann, John Mingers
2019 Journal of the Association for Information Science and Technology  
Using the so-called "excellence indicator" PP top-10% -the proportion of the top-10% most-highly-cited papers assigned to a university-we pursue a classification using (i) overlapping stability intervals  ...  The groups and intergroup relations can be analyzed and visualized using tools from network analysis.  ...  Acknowledgements We are grateful to Ricardo Sampaio, Ulrich Hoppe, and three anonymous referees for their comments.  ... 
doi:10.1002/asi.24130 fatcat:gasj6ym46rdjjnan55uw3xufna

Statistical Significance and Effect Sizes of Differences among Research Universities at the Level of Nations and Worldwide based on the Leiden Rankings [article]

Loet Leydesdorff, Lutz Bornmann, John Mingers
2018 arXiv   pre-print
Using the so-called "excellence indicator" PPtop-10%--the proportion of the top-10% most-highly-cited papers assigned to a university--we pursue a classification using (i) overlapping stability intervals  ...  The groups and intergroup relations can be analyzed and visualized using tools from network analysis.  ...  Acknowledgements We are grateful to Ricardo Sampaio, Ulrich Hoppe, and three anonymous referees for their comments.  ... 
arXiv:1710.11020v2 fatcat:btmaluolpjg4rnhtu72ulxx5ue

Ranking Law Journals and the Limits of Journal Citation Reports

Theodore Eisenberg, Martin T. Wells
2012 Social Science Research Network  
Rankings of schools, scholars, and journals emphasize ordinal rank. Cluster analysis is a supplement to ordinal ranking and we report the results of a cluster analysis of law journals.  ...  The ARC does organize journals into four large groups and provides generally reasonable rankings of journals.  ...  We demonstrate this by analyzing the relation between two continuous measures and how that relation changes when the continuous measures are transformed to ordinal ranks.  ... 
doi:10.2139/ssrn.2084169 fatcat:idb24fmtpraexdldg2oh6qaw2a

Retractions

Pierre Azoulay, Jeffrey L. Furman, Krieger, Fiona Murray
2015 Review of Economics and Statistics  
We examine the impact of over 1,100 scientific retractions on the citation trajectories of articles that are related to retracted papers in intellectual space but were published prior to the retraction  ...  To what extent does "false science" impact the rate and direction of scientific change?  ...  The coefficient on the interaction term shows that highly cited retracted papers -those in the top 25 th percentile of citations at the time of retraction -have larger negative spillovers on citations  ... 
doi:10.1162/rest_a_00469 fatcat:taf5liho45cmbemslfncvcet4e

Death of the Salesman but Not the Sales Force: How Interested Promotion Skews Scientific Valuation

Pierre Azoulay, J. Michael Wahlen, Ezra W. Zuckerman Sivan
2019 American Journal of Sociology  
Analysis of the impact made by the premature death of 720 elite life scientists on the citation trajectories of their articles indicates that death results in a long-lasting, positive increase in citation  ...  This effect seems due largely to the memorialization efforts made by the sales force as compared to recognition efforts on behalf of the still-living scientists, and is strongest for articles that had  ...  By the end of 2002; the Crabtree paper had garnered 214 citations, relatively close to the 218 citations that had accrued to the Li and Herskowitz paper-both articles belong to the top percentile of the  ... 
doi:10.1086/706800 fatcat:remumas2qvdnxaqzigcggax5im
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