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)
I just reviewed the article 'Implicit reporting standards in bibliometric research: what can reviewers' comments tell us about reporting completeness?' by @dimitystephen.bsky.social and colleagues. I like the article a lot!
Article: arxiv.org/abs/2508.162...
Review: prereview.org/reviews/1739...
Article: arxiv.org/abs/2508.162...
Review: prereview.org/reviews/1739...
October 19, 2025 at 4:15 PM
I just reviewed the article 'Implicit reporting standards in bibliometric research: what can reviewers' comments tell us about reporting completeness?' by @dimitystephen.bsky.social and colleagues. I like the article a lot!
Article: arxiv.org/abs/2508.162...
Review: prereview.org/reviews/1739...
Article: arxiv.org/abs/2508.162...
Review: prereview.org/reviews/1739...
As our analysis of @crossref.bsky.social metadata shows, there is room for improvement.
For instance, many preprint servers, including bioRxiv, medRxiv, OSF, SSRN and Preprints.org, make (almost) no author affiliation metadata available.
We report similar findings for other metadata elements.
For instance, many preprint servers, including bioRxiv, medRxiv, OSF, SSRN and Preprints.org, make (almost) no author affiliation metadata available.
We report similar findings for other metadata elements.
October 17, 2025 at 7:03 PM
As our analysis of @crossref.bsky.social metadata shows, there is room for improvement.
For instance, many preprint servers, including bioRxiv, medRxiv, OSF, SSRN and Preprints.org, make (almost) no author affiliation metadata available.
We report similar findings for other metadata elements.
For instance, many preprint servers, including bioRxiv, medRxiv, OSF, SSRN and Preprints.org, make (almost) no author affiliation metadata available.
We report similar findings for other metadata elements.
I just reviewed the article 'Analysis of citation dynamics reveals that you do not receive enough recognition for your influential science' by Salsabil Arabi, Chaoqun Ni and @bihutchins.bsky.social.
Article: www.biorxiv.org/content/10.1...
Review: prereview.org/reviews/1733...
Article: www.biorxiv.org/content/10.1...
Review: prereview.org/reviews/1733...
October 12, 2025 at 7:27 PM
I just reviewed the article 'Analysis of citation dynamics reveals that you do not receive enough recognition for your influential science' by Salsabil Arabi, Chaoqun Ni and @bihutchins.bsky.social.
Article: www.biorxiv.org/content/10.1...
Review: prereview.org/reviews/1733...
Article: www.biorxiv.org/content/10.1...
Review: prereview.org/reviews/1733...
I just reviewed the paper 'From Research to Impact: Assessing a Decade of CDC’s Public Health Science by Topic Area, 2014-2023' by Joy Ortega and colleagues.
Paper: doi.org/10.1101/2025...
Review: prereview.org/reviews/1648...
@prereview.bsky.social
#PublishYourReviews
Paper: doi.org/10.1101/2025...
Review: prereview.org/reviews/1648...
@prereview.bsky.social
#PublishYourReviews
July 27, 2025 at 9:36 AM
I just reviewed the paper 'From Research to Impact: Assessing a Decade of CDC’s Public Health Science by Topic Area, 2014-2023' by Joy Ortega and colleagues.
Paper: doi.org/10.1101/2025...
Review: prereview.org/reviews/1648...
@prereview.bsky.social
#PublishYourReviews
Paper: doi.org/10.1101/2025...
Review: prereview.org/reviews/1648...
@prereview.bsky.social
#PublishYourReviews
"assuming peer review is at breaking point or not far off, perhaps most obvious near-future change ... is widespread adoption of publish then curate model. We have tech stack to publish preprints ... and @elife.bsky.social's innovative model. What will it take ... to realise writing is on the wall?"
July 24, 2025 at 6:45 PM
"assuming peer review is at breaking point or not far off, perhaps most obvious near-future change ... is widespread adoption of publish then curate model. We have tech stack to publish preprints ... and @elife.bsky.social's innovative model. What will it take ... to realise writing is on the wall?"
Today I had the pleasure to be a panelist in the session 'moving beyond journals' at the @royalsociety.org Future of Scientific Publishing conference.
I argued that scientific publishing is going through a transformation addressing the challenges of openness, curation and meaningful dialogue.
I argued that scientific publishing is going through a transformation addressing the challenges of openness, curation and meaningful dialogue.
July 15, 2025 at 7:54 PM
Today I had the pleasure to be a panelist in the session 'moving beyond journals' at the @royalsociety.org Future of Scientific Publishing conference.
I argued that scientific publishing is going through a transformation addressing the challenges of openness, curation and meaningful dialogue.
I argued that scientific publishing is going through a transformation addressing the challenges of openness, curation and meaningful dialogue.
The MetaROR team also met with @dorassessment.bsky.social colleagues @ginnybarbour.bsky.social and @rnls.bsky.social.
Many thanks to DORA for publishing our post 'Judging research on its own merits: How MetaROR supports better research assessment' sfdora.org/2025/07/08/m....
@jasonchin.bsky.social
Many thanks to DORA for publishing our post 'Judging research on its own merits: How MetaROR supports better research assessment' sfdora.org/2025/07/08/m....
@jasonchin.bsky.social
July 13, 2025 at 12:42 PM
The MetaROR team also met with @dorassessment.bsky.social colleagues @ginnybarbour.bsky.social and @rnls.bsky.social.
Many thanks to DORA for publishing our post 'Judging research on its own merits: How MetaROR supports better research assessment' sfdora.org/2025/07/08/m....
@jasonchin.bsky.social
Many thanks to DORA for publishing our post 'Judging research on its own merits: How MetaROR supports better research assessment' sfdora.org/2025/07/08/m....
@jasonchin.bsky.social
The conference finally offered opportunity for MetaROR team to get together.
I had nice dinner with Kathy Zeiler, @stephenpinfield.bsky.social, @aidybarnett.bsky.social, @alexh.bsky.social, @andre-brasil.bsky.social.
Feeling privileged to work with such great team! cms.metaror.org/about-our-te...
I had nice dinner with Kathy Zeiler, @stephenpinfield.bsky.social, @aidybarnett.bsky.social, @alexh.bsky.social, @andre-brasil.bsky.social.
Feeling privileged to work with such great team! cms.metaror.org/about-our-te...
July 13, 2025 at 12:42 PM
The conference finally offered opportunity for MetaROR team to get together.
I had nice dinner with Kathy Zeiler, @stephenpinfield.bsky.social, @aidybarnett.bsky.social, @alexh.bsky.social, @andre-brasil.bsky.social.
Feeling privileged to work with such great team! cms.metaror.org/about-our-te...
I had nice dinner with Kathy Zeiler, @stephenpinfield.bsky.social, @aidybarnett.bsky.social, @alexh.bsky.social, @andre-brasil.bsky.social.
Feeling privileged to work with such great team! cms.metaror.org/about-our-te...
Very grateful to all colleagues in the metascience community who dropped by at the @metaror.bsky.social stand at the recent #Metascience2025 conference. Glad to see the overwhelming interest in the MetaROR platform!
metaror.org
@rorinstitute.bsky.social @aimosinc.bsky.social @cwts.nl
metaror.org
@rorinstitute.bsky.social @aimosinc.bsky.social @cwts.nl
July 13, 2025 at 12:42 PM
Very grateful to all colleagues in the metascience community who dropped by at the @metaror.bsky.social stand at the recent #Metascience2025 conference. Glad to see the overwhelming interest in the MetaROR platform!
metaror.org
@rorinstitute.bsky.social @aimosinc.bsky.social @cwts.nl
metaror.org
@rorinstitute.bsky.social @aimosinc.bsky.social @cwts.nl
In this blog post we make the case for the @metaror.bsky.social publish-review-curate model, arguing it supports better research assessment, as promoted by DORA and others.
@rorinstitute.bsky.social @aimosinc.bsky.social @cwts.nl
@rorinstitute.bsky.social @aimosinc.bsky.social @cwts.nl
July 8, 2025 at 10:18 AM
In this blog post we make the case for the @metaror.bsky.social publish-review-curate model, arguing it supports better research assessment, as promoted by DORA and others.
@rorinstitute.bsky.social @aimosinc.bsky.social @cwts.nl
@rorinstitute.bsky.social @aimosinc.bsky.social @cwts.nl
Very much enjoyed reading the paper 'Estimating transformative agreement impact on hybrid open access: A comparative large-scale study using Scopus, Web of Science and open metadata' by @najko.bsky.social.
arxiv.org/abs/2504.150...
@crossref.bsky.social
arxiv.org/abs/2504.150...
@crossref.bsky.social
June 15, 2025 at 8:36 AM
Very much enjoyed reading the paper 'Estimating transformative agreement impact on hybrid open access: A comparative large-scale study using Scopus, Web of Science and open metadata' by @najko.bsky.social.
arxiv.org/abs/2504.150...
@crossref.bsky.social
arxiv.org/abs/2504.150...
@crossref.bsky.social
Also good to see the emphasis on the need to connect discussions about scholarly communication to developments in the areas of research assessment reform (@coarassessment.bsky.social, @dorassessment.bsky.social) and open research information (@barcelonadori.bsky.social).
June 7, 2025 at 4:27 PM
Also good to see the emphasis on the need to connect discussions about scholarly communication to developments in the areas of research assessment reform (@coarassessment.bsky.social, @dorassessment.bsky.social) and open research information (@barcelonadori.bsky.social).
Scientific Publishing: Enough is Enough - Why we're no longer funding journal publications asterainstitute.substack.com/p/scientific...
@seemaychou.bsky.social
@seemaychou.bsky.social
June 3, 2025 at 4:48 AM
Scientific Publishing: Enough is Enough - Why we're no longer funding journal publications asterainstitute.substack.com/p/scientific...
@seemaychou.bsky.social
@seemaychou.bsky.social
Thanks Bart, and yes, researchers have lots of arguments for not preprinting their work. In fact, I recently studied these arguments doi.org/10.1002/asi.....
May 23, 2025 at 5:32 PM
Thanks Bart, and yes, researchers have lots of arguments for not preprinting their work. In fact, I recently studied these arguments doi.org/10.1002/asi.....
Zooming in on the Netherlands, there are interesting differences in preprint adoption between Dutch universities.
Building on earlier efforts to promote preprinting (doi.org/10.5281/zeno...), Dutch universities need to continue working on strengthening preprint adoption.
Building on earlier efforts to promote preprinting (doi.org/10.5281/zeno...), Dutch universities need to continue working on strengthening preprint adoption.
May 22, 2025 at 6:28 PM
Zooming in on the Netherlands, there are interesting differences in preprint adoption between Dutch universities.
Building on earlier efforts to promote preprinting (doi.org/10.5281/zeno...), Dutch universities need to continue working on strengthening preprint adoption.
Building on earlier efforts to promote preprinting (doi.org/10.5281/zeno...), Dutch universities need to continue working on strengthening preprint adoption.
How does the adoption of preprinting differ between European countries?
Preprint adoption is significantly higher in Western and Northern European countries than in their Southern and Eastern European neighbors.
Switzerland has the highest preprint adoption in Europe.
Preprint adoption is significantly higher in Western and Northern European countries than in their Southern and Eastern European neighbors.
Switzerland has the highest preprint adoption in Europe.
May 22, 2025 at 6:28 PM
How does the adoption of preprinting differ between European countries?
Preprint adoption is significantly higher in Western and Northern European countries than in their Southern and Eastern European neighbors.
Switzerland has the highest preprint adoption in Europe.
Preprint adoption is significantly higher in Western and Northern European countries than in their Southern and Eastern European neighbors.
Switzerland has the highest preprint adoption in Europe.
Together with Fernanda Beigel, @cwtsleiden.bsky.social colleague @ismaelrafols.bsky.social offers a highly critical perspective on developments in open science. Worth a read!
May 8, 2025 at 5:17 PM
Together with Fernanda Beigel, @cwtsleiden.bsky.social colleague @ismaelrafols.bsky.social offers a highly critical perspective on developments in open science. Worth a read!
Congrats, very well deserved. I am always impressed to see the Crossref Participation Report of eLife: www.crossref.org/members/prep....
May 7, 2025 at 3:59 PM
Congrats, very well deserved. I am always impressed to see the Crossref Participation Report of eLife: www.crossref.org/members/prep....
Preprinting helps accelerate dissemination of scientific knowledge. To what extent do researchers adopt preprinting? How does this vary by discipline and region?
Together with Narmin Rzayeva and @stephenpinfield.bsky.social, I just published article answering these questions. osf.io/preprints/so...
Together with Narmin Rzayeva and @stephenpinfield.bsky.social, I just published article answering these questions. osf.io/preprints/so...
May 1, 2025 at 2:25 PM
Preprinting helps accelerate dissemination of scientific knowledge. To what extent do researchers adopt preprinting? How does this vary by discipline and region?
Together with Narmin Rzayeva and @stephenpinfield.bsky.social, I just published article answering these questions. osf.io/preprints/so...
Together with Narmin Rzayeva and @stephenpinfield.bsky.social, I just published article answering these questions. osf.io/preprints/so...
Fascinating to see the different publishing practices in European countries.
This graph from arxiv.org/abs/2411.062... shows the number of MDPI publications of a country as a proportion of the number of publications in 'big five' journals (Elsevier, SN, Wiley, T&F, Sage) and MDPI journals.
This graph from arxiv.org/abs/2411.062... shows the number of MDPI publications of a country as a proportion of the number of publications in 'big five' journals (Elsevier, SN, Wiley, T&F, Sage) and MDPI journals.
April 19, 2025 at 4:48 PM
Fascinating to see the different publishing practices in European countries.
This graph from arxiv.org/abs/2411.062... shows the number of MDPI publications of a country as a proportion of the number of publications in 'big five' journals (Elsevier, SN, Wiley, T&F, Sage) and MDPI journals.
This graph from arxiv.org/abs/2411.062... shows the number of MDPI publications of a country as a proportion of the number of publications in 'big five' journals (Elsevier, SN, Wiley, T&F, Sage) and MDPI journals.
Important role of @egu.eu journals and Copernicus Publications in advancing preprinting and open peer review is also visible in recent piece about publish-review-curate model that I co-authored with @katiecorker.bsky.social and @jacoates.bsky.social: doi.org/10.31222/osf....
@asapbio.bsky.social
@asapbio.bsky.social
March 29, 2025 at 6:06 PM
Important role of @egu.eu journals and Copernicus Publications in advancing preprinting and open peer review is also visible in recent piece about publish-review-curate model that I co-authored with @katiecorker.bsky.social and @jacoates.bsky.social: doi.org/10.31222/osf....
@asapbio.bsky.social
@asapbio.bsky.social
Impressed by contribution of journal Atmospheric Chemistry and Physics, other @egu.eu journals and Copernicus Publications to innovation in scientific publishing.
They have successfully operated the publish-review-curate model already for over 20 years.
Read more here: doi.org/10.5194/egus....
They have successfully operated the publish-review-curate model already for over 20 years.
Read more here: doi.org/10.5194/egus....
March 29, 2025 at 6:06 PM
Impressed by contribution of journal Atmospheric Chemistry and Physics, other @egu.eu journals and Copernicus Publications to innovation in scientific publishing.
They have successfully operated the publish-review-curate model already for over 20 years.
Read more here: doi.org/10.5194/egus....
They have successfully operated the publish-review-curate model already for over 20 years.
Read more here: doi.org/10.5194/egus....