Making bibliometric reporting more transparent and consistent: Participants needed for pilot testing of GLOBAL

The team behind the GLOBAL reporting guideline invites researchers who are preparing or reviewing a bibliometric article to take part in a pilot test of the guideline.

Jeremy Y. Ng, Dimity Stephen, David Moher, Ludo Waltman and Stefanie Haustein • August 12, 2025

Analysing research funding flows in the Global South

In a context marked by deep asymmetries in access to research resources, the research project “Tracking Research Funding Flows in the Global South” aims to make visible and analyze the ways in which international funding for science circulates.

Matías Alcántara, Mariángela Nápoli, Judith Naidorf, Rodrigo Costas and Ismael Rafols • July 22, 2025

Beyond the dissertation: Reshaping PhD trajectories at Leiden University

Open Science and the reform of research assessment are increasingly growing together. Time to also rethink the evaluation of PhD candidates! Talking to six PhD candidates, the authors found that PhD paths need to be more flexible and recognise the diverse activities PhD researchers are active in.

Tanya Lee and Ana Parrón Cabañero • May 27, 2025 • 1 comment

The state of preprinting in Europe and the Netherlands

To accelerate the sharing of scientific knowledge, researchers in many disciplines increasingly publish their work on preprint servers. In this post, Ludo Waltman and colleagues discuss the state of preprinting in Europe and the Netherlands.

Ludo Waltman, Narmin Rzayeva and Stephen Pinfield • May 22, 2025

Setting the course: our first two years in the focal area Evaluation & Culture

The Evaluation and Culture focal area at CWTS is dedicated to studying, discussing, and advocating for renewed forms of scholarly communication, fair research evaluation, and inclusive research cultures. This blog post offers a reflection on our activities and progress over the past two years.

Evaluation & Culture • May 15, 2025

The contested field of Open Science: a debate through the lens of inclusion

Most implementations of Open Science do not fulfil the expectations that Open Science will lead to more equity and improve the societal impact of research. We discuss these worrying trends through the lens of inclusion.

Fernanda Beigel and Ismael Rafols • May 08, 2025

Advancing our Understanding of Systematic Manipulation & Paper Mills: Wiley & CWTS Partnership

The Centre for Science and Technology Studies at Leiden University, in collaboration with the publishing company Wiley, is opening a new position for a PhD candidate to carry out research on paper mills and related forms of systematic manipulation in publishing.

Wolfgang Kaltenbrunner, Catriona J Maccallum, Stephen Pinfield, Mike Streeter and Ludo Waltman • April 15, 2025

Strengthening science through diversity

Science in the US is under attack, with banned words, funding cuts, and threats to diversity, equity & inclusion and climate science. These actions harm science. CWTS’ focal areas respond, aligned with their mission to improve how science is practiced, governed, and serves society.

Information & Openness, Engagement & Inclusion and Evaluation & Culture • April 02, 2025

Assessment reform and publishing reform need to go hand in hand

The need to reform research assessment and scientific publishing practices is widely recognized. However, Ludo Waltman argues that the assessment and publishing reform movements will be successful only if they manage to align their agendas.

Ludo Waltman • March 26, 2025

Academic publishing – stuck in a prisoner’s dilemma?