Ludo Waltman

@ludowaltman.bsky.social

Scientific Director Centre for Science and Technology Studies (CWTS), Leiden University; Open Science Ambassador Leiden University; Co-chair Research on Research Institute (RoRI); President ASAPbio; Editor-in-Chief MetaROR (MetaResearch Open Review)

ASAPbio is planning a refresh of one of our most frequently used resources—the Preprint Services Directory! To make it easier to find the preprint server that best suits your needs, we'd like your feedback on the proposed changes. Details are in our recent blog post! buff.ly/ARj2mrm

Proposed Updates To Preprint Services Directory: Request For Comments – ASAPbio

ASAPbio is planning a refresh of its Preprint Services Directory (https://asapbio.org/preprint-servers/). Since 2020, ASAPbio has maintained the directory on

asapbio.org

𝐋𝐚 𝐃𝐞𝐜𝐥𝐚𝐫𝐚𝐜𝐢𝐨́𝐧 𝐝𝐞 𝐁𝐚𝐫𝐜𝐞𝐥𝐨𝐧𝐚 𝐥𝐥𝐞𝐠𝐚 𝐚 𝐂𝐨𝐬𝐭𝐚 𝐑𝐢𝐜𝐚 🇨🇷 Participaremos en el 𝐅𝐨𝐫𝐨 𝐋𝐚𝐭𝐢𝐧𝐨𝐚𝐦𝐞𝐫𝐢𝐜𝐚𝐧𝐨 𝐝𝐞 𝐂𝐢𝐞𝐧𝐜𝐢𝐚 𝐀𝐛𝐢𝐞𝐫𝐭𝐚: 📣 Avances de la Declaración de Barcelona4 agosto · 14:00 UTC−6 / 22:00 CEST 📊 Nuevas métricas para la ciencia abierta5 agosto · 09:00 UTC−6 / 17:00 CEST ¿Estarás? ¡Ven a saludarnos! 👋

Alt text: Agenda for the Latin American Open Science Forum in Heredia, Costa Rica, featuring sessions on the Barcelona Declaration and new metrics for open science on August 4 and

1/ In 2024, I filed a false claims act lawsuit against Elsevier, Springer, Wiley & Informa alleging they systematically overcharged US federal grants for article processing. The gov declined to intervene and now it's public. Some thoughts on what this is, and what it isn't:

Here is the revision of an article presenting an agent-based model of citation behavior and compares citation networks generated by this model with real-world citation networks. Reviewers feel most of their comments were addressed, though 1 reviewer mentions two more issues. 👇 Read now on MetaROR

Modeling the global citation network using the scalable agent-based simulator for citation analysis with recency-emphasized sampling (SASCA-ReS) - MetaROR

metaror.org

🌍 𝐏𝐨𝐥𝐢𝐜𝐲 𝐦𝐞𝐞𝐭𝐬 𝐩𝐫𝐚𝐜𝐭𝐢𝐜𝐞 𝐚𝐭 𝐭𝐡𝐞 𝟐𝟎𝟐𝟔 𝐎𝐩𝐞𝐧 𝐑𝐞𝐬𝐞𝐚𝐫𝐜𝐡 𝐈𝐧𝐟𝐨𝐫𝐦𝐚𝐭𝐢𝐨𝐧 𝐂𝐨𝐧𝐟𝐞𝐫𝐞𝐧𝐜𝐞. The CFP is open! Co-organized by Barcelona Declaration, @helmholtzosoffice.bsky.social @leibniz-gemeinschaft.de 🎤 Talks+posters 📅 24–25 Nov 📍 Berlin+online 📝 1 Sept 🔗 barcelona-declaration.org/conference_2...

Promotional graphic for the 2026 Conference of the Barcelona Declaration on Open Research Information. “Policy” and “Practice” are connected by two-way arrows beside a photo of a Berlin street. Call for Proposals: 24–25 November 2026, in Berlin and online; submission deadline 1 September. A QR code links to the submission form. Organized with the Leibniz Association and Helmholtz Open Science.

Ten simple rules for scholarly blogging. The fragmentation of social media and the rise of Generative Artificial intelligence have renewed the importance of scholarly blogs. New @upstreamblog.bsky.social post: doi.org/10.54900/xn5... by Catharina Ochsner, Heinz Pampel, Martin Fenner

Ten simple rules for scholarly blogging

The fragmentation of social media and the rise of Generative Artificial intelligence (AI) have renewed the importance of scholarly blogs. Similar to preprints, blogs enable researchers to communicate ...

doi.org

💭 Why is change in scholarly communication so hard to imagine? This article presents findings from a consultation for cOAlition S proposal Towards Responsible Publishing. Reviewers were generally positive but urged the authors to include more detail and potential solutions. 👇 Read now on MetaROR

Why is change in scholarly communication so hard to imagine? Findings from a stakeholder consultation for the cOAlition S proposal ‘Towards Responsible Publishing’ - MetaROR

metaror.org

𝐀 𝐦𝐚𝐣𝐨𝐫 𝐦𝐢𝐥𝐞𝐬𝐭𝐨𝐧𝐞 𝐟𝐨𝐫 𝐨𝐩𝐞𝐧 𝐫𝐞𝐬𝐞𝐚𝐫𝐜𝐡 𝐢𝐧𝐟𝐨𝐫𝐦𝐚𝐭𝐢𝐨𝐧🚀 This turns commitment into institutional change, and sends a signal that open research information can support transparent, reproducible, and inclusive research analytics. Congratulations to @cwts.nl, an initiator of the Barcelona Declaration! 👏

CWTS | Leiden University@cwts.nl · 2w ago

Today we announce a next step in our transition to open research information: CWTS will discontinue the use of Web of Science data, both in the Leiden Ranking and in the services that we offer to external organisations. Read more on our website 👉 edu.nl/vnepv @barcelonadori.bsky.social

Blue sky

"Springer Nature [... issued] an ultimatum about a year ago that we needed to increase the number of papers we accept per year immediately, and by a significant amount". Academic freedom and peer-reviewed quality control at its finest.

Open Library of Humanities@openlibhums.org · 2w ago

OLH Interview with Semantics of Natural Languages Our Editorial Officer, @maddiesinclair.bsky.social, speaks with the SNL editors about their move to #diamondOA, community-led publishing, and leaving Springer Nature to launch SNL with OLH. Read full interview: www.openlibhums.org/news/977/

📅 Save the date! The Metascience 2027 conference will be held in Montreal on June 14–16, 2027. Metascience 2027 is a global gathering for knowledge sharing, community building, and opportunities to define research and intervention priorities to improve science.

Save the Date: Metascience 2027 Set for Montreal

The Tanenbaum Open Science Institute and Center for Open Science (COS) are bringing the Metascience 2027 conference to Montreal on June 14–16, 2027.

cos.io

📣 New 𝐏𝐨𝐬𝐭𝐝𝐨𝐜𝐭𝐨𝐫𝐚𝐥 𝐑𝐞𝐬𝐞𝐚𝐫𝐜𝐡𝐞𝐫 opportunity at CWTS to conduct original research on how Public Engagement Activities (PEAs) can be better recognised and monitored within #OpenScience. The project is funded by @opensciencenl.bsky.social 🔗 Apply here until 𝟳 𝗔𝘂𝗴𝘂𝘀𝘁 👉️ careers.universiteitleiden.nl

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careers.universiteitleiden.nl

OpenAlex just launched OpenAlex Query Language (OQL) in *alpha*. This is a powerful and expressive query language that allows you to run queries you couldn't do before. I think evidence synthesis is definitely one of the big use cases as you see big improvements e.g proximity, nesting and/or etc(1)

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📣 We are calling on research funders who wish to engage in more equitable sharing of scientific research! 📝 ASAPbio and @creativecommons.bsky.social developed a standard Preprint Policy Framework that aims to further policy alignment regarding open practices for preprints. buff.ly/rW1GgDI

Advancing Openly Licensed Preprints: Aligning Across A Standard Preprints Policy Framework – ASAPbio

Keep up to date on open scholarly communication! Check out what’s new on the blog.

buff.ly

Caroline S. Wagner was a highly regarded scholar in the field of science and technology policy. In his obituary, Paul Wouters reflects on her impressive contributions to research on science policy, the globalization of research, international collaboration, and scientometrics.

In memoriam Caroline S. Wagner

Caroline S. Wagner (1955-2026) was a highly regarded scholar in the field of science and technology policy. Paul Wouters reflects on her impressive contributions to research on science policy, the glo...

leidenmadtrics.nl

Fantastic perspective on peer review by @rorinstitute.bsky.social, with some great ideas for future improvements to the current limping system: doi.org/10.6084/m9.f...

The Future of Peer Review: A system-wide perspective

This report presents the main outcomes of the PEER REVIEW project conducted by the Research on Research Institute (RoRI) from 2023 to 2026. It draws on the substantial literature on peer review as well as 39 in-depth interviews with experts from across the research system, including policymakers, funders, publishers, editors, researchers and others. Peer review is often seen as one of the cornerstones of the research system. At the same time, many researchers and other actors in the system have expressed deep concerns about dysfunctions of peer review. In response to this, much work has been done to assess and improve peer review in individual domains, notably within research funding, scholarly publishing, career advancement, and assessment of research units.However, by considering peer review in each domain in isolation, knowledge about peer review has remained fragmented, offering a weak basis for strengthening the organisation of peer review.In this report, we take a systemic perspective on peer review across domains. Rather than focusing on incremental process-level innovations in individual domains, we conclude there is a need for system-wide reform in peer review. We outline future pathways for such reform.

doi.org