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)
Reposted by Ludo Waltman
Despite this, Diana Hicks told us, “it certainly feels like mandating metrics gaming and so would encourage a culture not focused on integrity.”
Exclusive: ‘Highly problematic’ policy has Saudi university pressuring faculty to cite its research
Prince Sultan University At Prince Sultan University in Saudi Arabia, faculty members must help raise their school’s academic standing not by doing impactful work, but by citing the institution’s r…
retractionwatch.com
November 24, 2025 at 7:14 PM
Despite this, Diana Hicks told us, “it certainly feels like mandating metrics gaming and so would encourage a culture not focused on integrity.”
Reposted by Ludo Waltman
Huge congratulations to @sarahderijcke.nl on her appointment as Rector Magnificus @unileiden.bsky.social! Sarah is a brilliant scholar, a visionary & compassionate leader. I’m excited to see her channel her experience, wisdom & insight into this vital role www.universiteitleiden.nl/en/news/2025...
Sarah de Rijcke appointed Rector Magnificus of Leiden University
Professor Sarah de Rijcke will become the new Rector Magnificus on the Executive Board of Leiden University on 15 January 2026. She will succeed Professor Hester Bijl, who will become Rector Magnificu...
www.universiteitleiden.nl
November 24, 2025 at 5:07 PM
Huge congratulations to @sarahderijcke.nl on her appointment as Rector Magnificus @unileiden.bsky.social! Sarah is a brilliant scholar, a visionary & compassionate leader. I’m excited to see her channel her experience, wisdom & insight into this vital role www.universiteitleiden.nl/en/news/2025...
Reposted by Ludo Waltman
🎓 We are delighted to announce that our colleague @sarahderijcke.nl, Professor of Science, Technology & Innovation Studies at CWTS, has been appointed as Rector Magnificus of Leiden University.
We wish Sarah all the best in her new role at our university!
www.universiteitleiden.nl/en/news/2025...
We wish Sarah all the best in her new role at our university!
www.universiteitleiden.nl/en/news/2025...
Sarah de Rijcke appointed Rector Magnificus of Leiden University
Professor Sarah de Rijcke will become the new Rector Magnificus on the Executive Board of Leiden University on 15 January 2026. She will succeed Professor Hester Bijl, who will become Rector Magnificu...
www.universiteitleiden.nl
November 24, 2025 at 2:41 PM
🎓 We are delighted to announce that our colleague @sarahderijcke.nl, Professor of Science, Technology & Innovation Studies at CWTS, has been appointed as Rector Magnificus of Leiden University.
We wish Sarah all the best in her new role at our university!
www.universiteitleiden.nl/en/news/2025...
We wish Sarah all the best in her new role at our university!
www.universiteitleiden.nl/en/news/2025...
Reposted by Ludo Waltman
Congrats Ludo! Can't believe it's been a year already. Here's to many more to come!
November 24, 2025 at 12:50 PM
Congrats Ludo! Can't believe it's been a year already. Here's to many more to come!
Reposted by Ludo Waltman
One year ago we launched the MetaROR (MetaResearch Open Review) publish-review-curate platform. This has been one of the most exciting things I've been involved in over the past year.
Very grateful to everyone who has contributed to the development of MetaROR!
Very grateful to everyone who has contributed to the development of MetaROR!
🎈 Time flies! Exactly one year ago today @rorinstitute.bsky.social and @aimosinc.bsky.social launched MetaROR, a platform to publish metaresearch through the publish-review-curate approach.
Over the course of the year, we published 28 articles reviewed by 59 different reviewers.
[1/3]
Over the course of the year, we published 28 articles reviewed by 59 different reviewers.
[1/3]
MetaROR Turns One - MetaROR
An exciting year of open, community-driven evaluation of metaresearch One [...]
metaror.org
November 21, 2025 at 2:10 PM
One year ago we launched the MetaROR (MetaResearch Open Review) publish-review-curate platform. This has been one of the most exciting things I've been involved in over the past year.
Very grateful to everyone who has contributed to the development of MetaROR!
Very grateful to everyone who has contributed to the development of MetaROR!
Reposted by Ludo Waltman
We summarized the Drain paper in an LSE Impact blog post this week. Please share in your networks, ideally with those we are calling to action: research funders and university leadership
blogs.lse.ac.uk/impactofsoci... #AcademicSky #AcademicPublishing #OpenAccess #ScholComm
blogs.lse.ac.uk/impactofsoci... #AcademicSky #AcademicPublishing #OpenAccess #ScholComm
November 20, 2025 at 6:14 PM
We summarized the Drain paper in an LSE Impact blog post this week. Please share in your networks, ideally with those we are calling to action: research funders and university leadership
blogs.lse.ac.uk/impactofsoci... #AcademicSky #AcademicPublishing #OpenAccess #ScholComm
blogs.lse.ac.uk/impactofsoci... #AcademicSky #AcademicPublishing #OpenAccess #ScholComm
Reposted by Ludo Waltman
Money, Time, Trust, Control – How commercial publishers drain science
@danbrockington.bsky.social @aileenfyfe.bsky.social @stefhaustein.scholcommlab.ca for @lseimpactblog.bsky.social
@danbrockington.bsky.social @aileenfyfe.bsky.social @stefhaustein.scholcommlab.ca for @lseimpactblog.bsky.social
Money, Time, Trust, Control – How commercial publishers drain science - Impact of Social Sciences
Have the interests of commercial publishers now become antithetical to the pursuit of knowledge?
blogs.lse.ac.uk
November 21, 2025 at 8:32 AM
Money, Time, Trust, Control – How commercial publishers drain science
@danbrockington.bsky.social @aileenfyfe.bsky.social @stefhaustein.scholcommlab.ca for @lseimpactblog.bsky.social
@danbrockington.bsky.social @aileenfyfe.bsky.social @stefhaustein.scholcommlab.ca for @lseimpactblog.bsky.social
Reposted by Ludo Waltman
Discussion about next steps for MetaROR @metaror.bsky.social A partnership between @aimosinc.bsky.social and @rorinstitute.bsky.social
Led by @alexh.bsky.social and @aidybarnett.bsky.social
#AIMOS2025
Led by @alexh.bsky.social and @aidybarnett.bsky.social
#AIMOS2025
November 20, 2025 at 4:38 AM
Discussion about next steps for MetaROR @metaror.bsky.social A partnership between @aimosinc.bsky.social and @rorinstitute.bsky.social
Led by @alexh.bsky.social and @aidybarnett.bsky.social
#AIMOS2025
Led by @alexh.bsky.social and @aidybarnett.bsky.social
#AIMOS2025
One year ago we launched the MetaROR (MetaResearch Open Review) publish-review-curate platform. This has been one of the most exciting things I've been involved in over the past year.
Very grateful to everyone who has contributed to the development of MetaROR!
Very grateful to everyone who has contributed to the development of MetaROR!
🎈 Time flies! Exactly one year ago today @rorinstitute.bsky.social and @aimosinc.bsky.social launched MetaROR, a platform to publish metaresearch through the publish-review-curate approach.
Over the course of the year, we published 28 articles reviewed by 59 different reviewers.
[1/3]
Over the course of the year, we published 28 articles reviewed by 59 different reviewers.
[1/3]
MetaROR Turns One - MetaROR
An exciting year of open, community-driven evaluation of metaresearch One [...]
metaror.org
November 21, 2025 at 2:10 PM
One year ago we launched the MetaROR (MetaResearch Open Review) publish-review-curate platform. This has been one of the most exciting things I've been involved in over the past year.
Very grateful to everyone who has contributed to the development of MetaROR!
Very grateful to everyone who has contributed to the development of MetaROR!
Reposted by Ludo Waltman
🚀 Munin Conference 2025 is LIVE at UiT! 🌟 Exciting discussions on making scholarly metadata openly available underway. Join the conversation! 📝📊 #Munin2025 #OpenScience #ScholarlyPublishing #Tromsø #Norway
November 18, 2025 at 9:10 AM
🚀 Munin Conference 2025 is LIVE at UiT! 🌟 Exciting discussions on making scholarly metadata openly available underway. Join the conversation! 📝📊 #Munin2025 #OpenScience #ScholarlyPublishing #Tromsø #Norway
Reposted by Ludo Waltman
Our new preprint! The Acknowledgments problem, and what to do about it.
With @martonkovacs.bsky.social, @pietropollo.bsky.social, @philobolobstime.bsky.social, Losia Lagisz, & Mohammad Hosseini.
With @martonkovacs.bsky.social, @pietropollo.bsky.social, @philobolobstime.bsky.social, Losia Lagisz, & Mohammad Hosseini.
November 17, 2025 at 10:19 PM
Our new preprint! The Acknowledgments problem, and what to do about it.
With @martonkovacs.bsky.social, @pietropollo.bsky.social, @philobolobstime.bsky.social, Losia Lagisz, & Mohammad Hosseini.
With @martonkovacs.bsky.social, @pietropollo.bsky.social, @philobolobstime.bsky.social, Losia Lagisz, & Mohammad Hosseini.
I just reviewed the article 'PreprintToPaper dataset: connecting bioRxiv preprints with journal publications' by Badalova, Sienkiewicz and Mayr.
Article: arxiv.org/abs/2510.017...
Review: prereview.org/reviews/1762...
@biorxiv-medrxiv.bsky.social
@prereview.bsky.social
#PublishYourReviews
Article: arxiv.org/abs/2510.017...
Review: prereview.org/reviews/1762...
@biorxiv-medrxiv.bsky.social
@prereview.bsky.social
#PublishYourReviews
November 17, 2025 at 5:43 AM
I just reviewed the article 'PreprintToPaper dataset: connecting bioRxiv preprints with journal publications' by Badalova, Sienkiewicz and Mayr.
Article: arxiv.org/abs/2510.017...
Review: prereview.org/reviews/1762...
@biorxiv-medrxiv.bsky.social
@prereview.bsky.social
#PublishYourReviews
Article: arxiv.org/abs/2510.017...
Review: prereview.org/reviews/1762...
@biorxiv-medrxiv.bsky.social
@prereview.bsky.social
#PublishYourReviews
Reposted by Ludo Waltman
TU/e has gained a new research centre: META/e. Daniël Lakens and Krist Vaesen were among the founders of this knowledge hub for metascience—research aimed at improving the practice of science itself. “We want to be a home for every researcher who occasionally wonders: what are we even doing?”
Knowledge centre META/e: home for those improving science
TU/e has gained a new research centre: META/e. Daniël Lakens and Krist Vaesen were among the founders of this knowledge hub for metascience—research aimed at improving the practice of science itself. ...
www.cursor.tue.nl
November 13, 2025 at 2:50 PM
TU/e has gained a new research centre: META/e. Daniël Lakens and Krist Vaesen were among the founders of this knowledge hub for metascience—research aimed at improving the practice of science itself. “We want to be a home for every researcher who occasionally wonders: what are we even doing?”
Reposted by Ludo Waltman
Great to see that cOAlition S is going to enhance its "focus on sustainable and equitable models, such as PRC, diamond open access and preprints".
This aligns with some of the work we are doing at @cwts.nl and in @rorinstitute.bsky.social.
This aligns with some of the work we are doing at @cwts.nl and in @rorinstitute.bsky.social.
1/ cOAlition S announces its 2026–2030 strategy, guided by a refreshed, shared vision: a scholarly communication system that enables rapid, open, transparent & equitable sharing of trustworthy scientific knowledge.
www.coalition-s.org/coalition-s-...
#OpenScience #ScholarlyComm #Plan_S #OpenAccess
www.coalition-s.org/coalition-s-...
#OpenScience #ScholarlyComm #Plan_S #OpenAccess
November 12, 2025 at 6:33 PM
Great to see that cOAlition S is going to enhance its "focus on sustainable and equitable models, such as PRC, diamond open access and preprints".
This aligns with some of the work we are doing at @cwts.nl and in @rorinstitute.bsky.social.
This aligns with some of the work we are doing at @cwts.nl and in @rorinstitute.bsky.social.
Great to see that cOAlition S is going to enhance its "focus on sustainable and equitable models, such as PRC, diamond open access and preprints".
This aligns with some of the work we are doing at @cwts.nl and in @rorinstitute.bsky.social.
This aligns with some of the work we are doing at @cwts.nl and in @rorinstitute.bsky.social.
1/ cOAlition S announces its 2026–2030 strategy, guided by a refreshed, shared vision: a scholarly communication system that enables rapid, open, transparent & equitable sharing of trustworthy scientific knowledge.
www.coalition-s.org/coalition-s-...
#OpenScience #ScholarlyComm #Plan_S #OpenAccess
www.coalition-s.org/coalition-s-...
#OpenScience #ScholarlyComm #Plan_S #OpenAccess
November 12, 2025 at 6:33 PM
Great to see that cOAlition S is going to enhance its "focus on sustainable and equitable models, such as PRC, diamond open access and preprints".
This aligns with some of the work we are doing at @cwts.nl and in @rorinstitute.bsky.social.
This aligns with some of the work we are doing at @cwts.nl and in @rorinstitute.bsky.social.
Reposted by Ludo Waltman
Join RoRI Co-Chair @ludowaltman.bsky.social in Cambridge on 3 Dec, where he'll be a keynote at a forum exploring the Publish, Review, Curate model.
The event will showcase initiatives and discuss how this model can shape the future of scholarly communication: coar-repositories.org/news-updates...
The event will showcase initiatives and discuss how this model can shape the future of scholarly communication: coar-repositories.org/news-updates...
November 12, 2025 at 12:44 PM
Join RoRI Co-Chair @ludowaltman.bsky.social in Cambridge on 3 Dec, where he'll be a keynote at a forum exploring the Publish, Review, Curate model.
The event will showcase initiatives and discuss how this model can shape the future of scholarly communication: coar-repositories.org/news-updates...
The event will showcase initiatives and discuss how this model can shape the future of scholarly communication: coar-repositories.org/news-updates...
Very proud of @eleonoradagiene.bsky.social. It was a great pleasure to supervise her PhD research!
🎓 Last week, Dr. Eleonora Dagiene successfully defended her PhD thesis titled 'Quantitative research assessment and its unintended consequences' at Leiden University.
Congratulations on this amazing achievement!! 🥂
www.universiteitleiden.nl/en/news/2025...
Congratulations on this amazing achievement!! 🥂
www.universiteitleiden.nl/en/news/2025...
Congratulations, Dr. Eleonora Dagienė!
On 30 October 2025, Eleonora Dagienė successfully defended her PhD thesis at Leiden University, titled ‘Quantitative Research Assessment and its Unintended Consequences’.
www.universiteitleiden.nl
November 7, 2025 at 11:08 AM
Very proud of @eleonoradagiene.bsky.social. It was a great pleasure to supervise her PhD research!
Reposted by Ludo Waltman
Nederland koploper met 95% OA, maar vernieuwing strategie is nodig www.universiteitenvannederland.nl/actueel/nieu...
"Universiteiten willen meer grip krijgen op hoe wetenschappelijk onderzoek wordt gepubliceerd en hoe we de autonomie van wetenschappers op ... publicatieprocessen kunnen verhogen."
"Universiteiten willen meer grip krijgen op hoe wetenschappelijk onderzoek wordt gepubliceerd en hoe we de autonomie van wetenschappers op ... publicatieprocessen kunnen verhogen."
Nederland koploper met 95 procent Open Access, maar vernieuwing strategie is nodig
Sinds 2016 is het percentage open toegankelijke peer-reviewed artikelen gestegen van 42 procent open access naar 95 procent in 2024. Daarmee is Nederland een koploper in de wereld. Caspar van den Berg...
www.universiteitenvannederland.nl
November 6, 2025 at 8:30 PM
Nederland koploper met 95% OA, maar vernieuwing strategie is nodig www.universiteitenvannederland.nl/actueel/nieu...
"Universiteiten willen meer grip krijgen op hoe wetenschappelijk onderzoek wordt gepubliceerd en hoe we de autonomie van wetenschappers op ... publicatieprocessen kunnen verhogen."
"Universiteiten willen meer grip krijgen op hoe wetenschappelijk onderzoek wordt gepubliceerd en hoe we de autonomie van wetenschappers op ... publicatieprocessen kunnen verhogen."
Reposted by Ludo Waltman
Excited to launch an openRxiv partnership with the scientist-run AI review service qed (@qedscience.bsky.social), the brainchild of @odedrechavi.bsky.social 1/n
openrxiv.org/enabling-rev...
openrxiv.org/enabling-rev...
Enabling options for review: from training and transparency to author-centered AI tools - openRxiv
Peer review is widely viewed as a critical aspect of biomedical communication. Ideally, it provides authors with feedback so they can improve manuscripts and gives readers, particularly nonspecialists...
openrxiv.org
November 6, 2025 at 2:32 PM
Excited to launch an openRxiv partnership with the scientist-run AI review service qed (@qedscience.bsky.social), the brainchild of @odedrechavi.bsky.social 1/n
openrxiv.org/enabling-rev...
openrxiv.org/enabling-rev...
Nederland koploper met 95% OA, maar vernieuwing strategie is nodig www.universiteitenvannederland.nl/actueel/nieu...
"Universiteiten willen meer grip krijgen op hoe wetenschappelijk onderzoek wordt gepubliceerd en hoe we de autonomie van wetenschappers op ... publicatieprocessen kunnen verhogen."
"Universiteiten willen meer grip krijgen op hoe wetenschappelijk onderzoek wordt gepubliceerd en hoe we de autonomie van wetenschappers op ... publicatieprocessen kunnen verhogen."
Nederland koploper met 95 procent Open Access, maar vernieuwing strategie is nodig
Sinds 2016 is het percentage open toegankelijke peer-reviewed artikelen gestegen van 42 procent open access naar 95 procent in 2024. Daarmee is Nederland een koploper in de wereld. Caspar van den Berg...
www.universiteitenvannederland.nl
November 6, 2025 at 8:30 PM
Nederland koploper met 95% OA, maar vernieuwing strategie is nodig www.universiteitenvannederland.nl/actueel/nieu...
"Universiteiten willen meer grip krijgen op hoe wetenschappelijk onderzoek wordt gepubliceerd en hoe we de autonomie van wetenschappers op ... publicatieprocessen kunnen verhogen."
"Universiteiten willen meer grip krijgen op hoe wetenschappelijk onderzoek wordt gepubliceerd en hoe we de autonomie van wetenschappers op ... publicatieprocessen kunnen verhogen."
Reposted by Ludo Waltman
Congratulations to us, and thank you, @kohli-sociology.bsky.social!
November 5, 2025 at 3:33 PM
Congratulations to us, and thank you, @kohli-sociology.bsky.social!
Work by @rorinstitute.bsky.social project team has been peer reviewed openly on the @metaror.bsky.social platform.
Nice demonstration of the commitment of RoRI colleagues to MetaROR's publish-review-curate model!
Nice demonstration of the commitment of RoRI colleagues to MetaROR's publish-review-curate model!
How are national systems for assessing publicly funded research evolving? That's the question our latest article poses.
Reviewers consider the work "valuable and timely", noting its relevance to reform initiatives like @coarassessment.bsky.social
👇 Read the assessment, reviews & full article here
Reviewers consider the work "valuable and timely", noting its relevance to reform initiatives like @coarassessment.bsky.social
👇 Read the assessment, reviews & full article here
A new typology of national research assessment systems: continuity and change in 13 countries
metaror.org
November 4, 2025 at 9:20 PM
Work by @rorinstitute.bsky.social project team has been peer reviewed openly on the @metaror.bsky.social platform.
Nice demonstration of the commitment of RoRI colleagues to MetaROR's publish-review-curate model!
Nice demonstration of the commitment of RoRI colleagues to MetaROR's publish-review-curate model!
Reposted by Ludo Waltman
What better time than #OAWeek to share 13 actions researchers can take for fairer, more sustainable publishing? From posting preprints to supporting diamond journals to refusing to review for exploitative publishers: each small action matters when we act collectively.
October 22, 2025 at 7:57 PM
What better time than #OAWeek to share 13 actions researchers can take for fairer, more sustainable publishing? From posting preprints to supporting diamond journals to refusing to review for exploitative publishers: each small action matters when we act collectively.
"communities have been creating their own spaces to freely publish, discuss, and consume their research, from domain-specific preprint communities to grassroots publishing platforms ..."
As we round out #OAweek, we’re reflecting on how open access moves us forward—but when it’s linked to open plans, methods, data, code, and review, its benefits multiply.
🔗 Read more: www.cos.io/blog/lifecyc...
🔗 Read more: www.cos.io/blog/lifecyc...
Lifecycle Open Access
Open access publishing has transformed how we share and consume knowledge. By providing free, immediate, and unrestricted online access to scholarly research, open access has led to a shift in publish...
www.cos.io
November 3, 2025 at 7:05 PM
"communities have been creating their own spaces to freely publish, discuss, and consume their research, from domain-specific preprint communities to grassroots publishing platforms ..."
Reposted by Ludo Waltman
📰 Opinion piece (in Dutch) in the Dutch newspaper Het Financieele Dagblad by our scientific director @ludowaltman.bsky.social. Reacting to an earlier opinion piece, he argues for why universities are right to step away from the big commercial university rankings 👇
In het Financieele Dagblad beargumenteer ik dat universiteiten gelijk hebben om afstand te nemen van ranglijsten, in tegenstelling tot wat Sebastien Valkenberg in zijn recente column stelt:
fd.nl/opinie/15757...
FD stuk is paywalled, maar is ook beschikbaar via:
docs.google.com/document/d/1...
fd.nl/opinie/15757...
FD stuk is paywalled, maar is ook beschikbaar via:
docs.google.com/document/d/1...
Waarom universiteiten gelijk hebben als ze afstand nemen van misleidende ranglijsten en focussen op echte kwaliteit
Internationale ranglijsten lijken objectief, maar meten vooral wat commercieel goed uitkomt. Ze zeggen weinig over de kwaliteit van onderwijs en onderzoek, schrijft Ludo Waltman, voorzitter van de nat...
fd.nl
November 3, 2025 at 1:22 PM
📰 Opinion piece (in Dutch) in the Dutch newspaper Het Financieele Dagblad by our scientific director @ludowaltman.bsky.social. Reacting to an earlier opinion piece, he argues for why universities are right to step away from the big commercial university rankings 👇