This was a joyful collaboration with @rhaunschild.bsky.social and @lutzb.bsky.social

Our latest article argues that citation noise "represents an [...] underexplored challenge in citation analysis". Reviewers appreciate the fresh/innovative approach but question its conceptual underpinning: can citation accuracy be determined objectively? 👇 Read the assessment, reviews & full text

Very glad to see this collaborative work w/ Robin Haunschild and @lutzb.bsky.social published in Journal of Informetrics "A study of gender and regional differences in scientific mobility and immobility among researchers identified as potentially talented" Open Access here: doi.org/10.1016/j.jo...

The recent debate in JoI highlights a key issue often ignored in evaluation: doi.org/10.1016/j.jo... When all publication types are counted, normalized #metrics become inconsistent and misleading. But once we restrict the analysis to articles and reviews, correlations rise sharply. #bibliometrics

Is research performance related to academic freedom? A preprint co-authored with @lutzb.bsky.social conducts a large-scale empirical analysis on the national level to this question. osf.io/2mh8f #academicfreedom #AcademicFreedomIndex Short 🧵

How similar are field-normalized citation impact scores obtained from OpenAlex and three popular commercial databases? An empirical comparison based on large German universities. link.springer.com/article/10.1...

Prof Gunnar Sivertsen (NIFU, Norway) has been awarded the Derek de Solla Price Medal 2025 of the international journal Scientometrics. The awarding ceremony will take place during the 20th ISSI Conference in Yerevan (Armenia) to be held on 23–27 June 2025. www.issi-society.org/awards/derek...

Metrics sonification: The introduction of new ways to present bibliometric data using publication data of Loet Leydesdorff as an example. https://rdcu.be/eiqC4

The MPIWG’s Research Report 2021–2024 is now available online and in print! 📗 The report provides insights into the Institute’s structure and research, including our researchers and staff, projects, and publications. 🔗 bitly.cx/l3ovd #HistSci #HistMed #EnvHist #STS #Sinology #DigitalHumanities

I am extremely happy to share. Just out in @pnas.org: “Global subnational estimates of migration of scientists reveal large disparities in internal and international flows” Open Access: doi.org/10.1073/pnas... with Maciej J. Dańko, Xinyi Zhao, @ezagheni.bsky.social @mpidr.bsky.social #PAA2025

index (D). While prior studies emphasize minimum citation windows (mostly 3-5 years) for reliable citation impact measurements, the time-sensitive nature of D - which quantifies a paper' s capacity to eclipse prior knowledge - remains underexplored. [2/6 of https://arxiv.org/abs/2504.07828v1]

highly disruptive and consolidating works. The findings offer significant implications for scholarly evaluation and science policy, emphasizing the need for careful consideration of citation window length in research assessment (based on D). [6/6 of https://arxiv.org/abs/2504.07828v1]

classifications, while shorter windows (3 years) exhibit instability. Publications with >=30 references stabilize 1-3 years faster, and extreme cases (top/bottom 5% D values) become identifiable within 5 years - enabling early detection of 60-80% of [5/6 of https://arxiv.org/abs/2504.07828v1]

Hongkan Chen, Lutz Bornmann, Yi Bu: Dynamic disruption index across citation and cited references windows: Recommendations for thresholds in research evaluation https://arxiv.org/abs/2504.07828 https://arxiv.org/pdf/2504.07828 https://arxiv.org/html/2504.07828

'The influence of public policy and administration expertise on #policy: an empirical study' New from Evidence & Policy, by @rhaunschild.bsky.social, Kate Williams & @lutzb.bsky.social:

👀 ICYMI: @lutzb.bsky.social & Christian Ganser explore the phenomenon of hyperprolific authors, who publish a research paper every five days, and what listening to their output metrics can tell us about ‘research productivity’. #Citations #Bibliometrics #Academia

The attacks on science in the US raise serious concerns. With other colleagues at CWTS, we discuss how our research relates to these developments, and how we intend to monitor science at risk.

Our upcoming Open Research Seminars in May, June and July on the German Excellence Initiative, measuring disruption in science and evaluative bibliometrics in the DORA/CoARA context:

Registration is open for the esss european summer school for scientometrics! esss.info

The special track on Open Research Information at @stienid2025.bsky.social is open to submissions via the regular conference submission tool.

💥 New: Metrics sonification – What we can learn from listening to the output of hyperprolific academic authors ✍️ @lutzb.bsky.social & Christian Ganser #Bibliometrics #AcademicSky #DataViz

Reminder: The deadline for submissions to the 29th Annual Science and Technology Indicators Conference (STI 2025) is fast approaching!🚨 🔗 Submit your work here: auth.oxfordabstracts.com?redirect=/st... Need more time? Just reach out at [email protected] we're happy to accommodate!

Proposal of a gold standard combining different UN SDG assignments from different data providers: doi.org/10.1007/s111... @lutzb.bsky.social Many thanks to @clarivateag.bsky.social, @elsevierconnect.bsky.social, and OSDG.ai for providing SDG assignments.

What were the death tolls from pandemics in history?

Why do nearly 45,000 scholarly papers cite themselves? My latest for @retractionwatch.com: retractionwatch.com/2025/03/19/p... @lutzb.bsky.social, @mollymking.bsky.social

Catchy, clear, concise: three-part phrases in research-paper titles garner more citations. Nice to know that the 'rule of three' also works for science articles. Could get irritating if over-used? by @dalmeet.bsky.social | @nature.com www.nature.com/articles/d41...

🎶 When it comes to making sense of data, visualizations rule. But what about translating data into sound? In today's blog post, @lutzb.bsky.social explores 'data sonification' and its many applications and shows: even bibliometric data can be turned into sound. www.leidenmadtrics.nl/articles/met...

We published an update of our excellence mapping at www.excellencemapping.net

The 30th Nordic Workshop on Bibliometrics and Research Policy takes place in Bergen, Norway October 29-31 this year. The Call for Abstracts is now out, and submissions open March 17th. Presentations and posters alike are welcome. Hope to see you there?

How to use assignments of United Nations sustainable development goals (SDGs) to scientific papers in research evaluation? The proposal of a gold standard combining assignments from different data providers link.springer.com/co...

📅 Want to learn more about MetaROR and its publish, review, curate model of scholarly communication? Join @stephenpinfield.bsky.social and André Brasil for this webinar on 2 April at 10:00 BST!

We're happy to announce MetaROR has joined Bluesky! We're a community-owned platform for open peer review in metaresearch. Using the innovative Publish-Review-Curate model, we're transforming how metaresearch is published & reviewed, making the process faster and more open. Find us on metaror.org

We (AIMOS and RORI) launched a metascience platform, MetaROR.org, several months ago 😀. Submit your metascience-related preprints and get peer reviews! André Brasil articulates the vision here, reflecting the hard work he's done to get the platform working for us. katinamagazine.org/content/arti...

across publication years. We found a skewed distribution across countries, journals, authors, fields, and document types. Finally, we discuss the implications of paper self-citations for bibliometric indicators. [4/4 of https://arxiv.org/abs/2503.04324v1]

found cases where paper self-citations occur due to publisher-made highlights promoting and citing the paper. We analyzed the self-citing papers according to selected metadata. We observed accumulations of the number of self-citing papers [3/4 of https://arxiv.org/abs/2503.04324v1]

Robin Haunschild, Lutz Bornmann: Paper self-citation: An unexplored phenomenon https://arxiv.org/abs/2503.04324 https://arxiv.org/pdf/2503.04324 https://arxiv.org/html/2503.04324

Registration for #Metascience2025 is now open! Join us in London from 30 June to 2 July for the largest gathering yet of the global metascience community metascience.info/registration/ @rorinstitute.bsky.social @cos.io

"The Max Planck Society (MPG), Germany’s top research organisation, says that the country could benefit from the new US administration’s increasingly restrictive research policies, and is stepping up efforts to recruit elite US scientists and scholars". www.universityworldnews.com/post-mobile....

Citations drop after scientists accused of sexual, but not scientific, misconduct | Science | AAAS www.science.org/content/arti...

In our next #kb #openresearchseminar Gunnar Sivertsen will speak on ‘The impact of geopolitics on research activity and international cooperation in science: the case of Russia’. 12 March, 2-3pm. #bibliometrics #scientometrics #russia

We started this project in Oct '22 - it proved ridiculously (though maybe predictably) difficult to build something that could be applied consistently across different countries and policy settings. Great work from @kat-hart.bsky.social !

'The influence of public policy and administration expertise on #policy: an empirical study' New from Evidence & Policy, by @rhaunschild.bsky.social, Kate Williams & @lutzb.bsky.social:

Based on this paper, we have contributed a blog post: evidenceandpolicyblog.co.uk/2025/02/19/d... #bibliometrics #altmetrics #policy

Very much looking forward to #Metascience2025 this summer in London, organized by @rorinstitute.bsky.social and @cos.io metascience.info. This will be crucial event in development of metaresearch field, with exciting opportunities to bring together researchers, policy makers and other stakeholders.

Do you want to know how public policy and administration research expertise is used in policymaking? doi.org/10.1332/1744... #scientometrics #altmetrics Many thanks to @overton.io for providing the policy data for the study with Kate Williams and @lutzb.bsky.social .

The influence of public policy and administration expertise on policy: an empirical study https://bristoluniversitypressdigital.com/view/journals/evp/aop/article-10.1332-17442648Y2024D000000042/article-10.1332-17442648Y2024D000000042.xml