Ludo Waltman is Professor of Quantitative Science Studies at Centre for Science and Technology Studies, Leiden University and Deputy Director at Centre for Science and Technology Studies, Leiden University

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The CWTS Leiden Ranking 2023

Today CWTS releases the 2023 edition of the CWTS Leiden Ranking. In this post, the Leiden Ranking team provides an update on ongoing developments related to the ranking.

Nees Jan van Eck, Ludo Waltman, Zeynep Anli, Clara Calero-Medina, Dan Gibson, Mark Neijssel, Andrea Reyes Elizondo, Martijn Visser, Henri de Winter and Alfredo Yegros • June 21, 2023

"Smart alone, brilliant together"

Academic publishing is on the move. Dissatisfaction with the dominant publishing paradigm has given rise to a manifold of new ideas, projects and services. The time is ripe for consolidation of the most promising developments.

Anna van ‘t Veer, Thed van Leeuwen, Dan Rudmann, Leo Waaijers and Ludo Waltman • May 25, 2023

The focal areas of CWTS

In this post the directors of CWTS introduce the three focal areas of the centre. These focal areas were established on January 1, 2023 as part of the launch of the CWTS knowledge agenda 2023-2028.

Sarah de Rijcke, Ludo Waltman and Ed Noyons • May 09, 2023

Introducing the CWTS knowledge agenda 2023-2028

On January 1, 2023 CWTS launched its new knowledge agenda, a strategic plan for the centre for the period 2023-2028. In this post the directors of CWTS introduce the new knowledge agenda.

Sarah de Rijcke, Ludo Waltman and Ed Noyons • May 09, 2023

The Journal Observatory - Connecting information on scholarly communication

As scholarly communication is getting more diverse and transparent, there is an increasing need for reliable information on platforms’ policies. The Journal Observatory project aims to connect existing data and build toward systematic high-quality information on scholarly communication platforms.

Bram van den Boomen, Nees Jan van Eck, Ludo Waltman, Tony Ross-Hellauer and Serge Horbach • May 01, 2023

Experimenting with open science practices at the STI 2023 conference

As organizers of the STI 2023 conference, we introduce two open science experiments: We adopt a new publication and peer review process and we invite authors of conference contributions to reflect on their open science practices.

Ludo Waltman, Rong Ni, Kwun Hang (Adrian) Lai, Marc Luwel, Biegzat Mulati, Ed Noyons, Thed van Leeuwen, Leo Waaijers, Jian Wang and Verena Weimer • February 15, 2023

Q&A about Wiley's decision to open its abstracts

In this post Ludo Waltman and Bianca Kramer reflect on today’s announcement that Wiley is joining the Initiative for Open Abstracts (I4OA) and is going to make abstracts openly available through Crossref.

Ludo Waltman and Bianca Kramer • October 25, 2022

Dreaming at CWTS

What happens when you bring together the CWTS team and let them dream into the blue? Five visionary project ideas! From a New Society-Science Collaboration to the Participatory Activists Network or the enigmatic GRRASS: nothing was unthinkable.

Ed Noyons and Ludo Waltman • October 18, 2022

The growth of open peer review

The closed nature of the traditional journal peer review system is often criticized. Over the past two decades, significant efforts have been made to make peer review more open. Ludo Waltman and Nees Jan van Eck use data from Crossref to analyze the growth of open peer review.

Ludo Waltman and Nees Jan van Eck • July 06, 2022