Ludo Waltman

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

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CWTS Development

Opening the black box of university rankings

Today two university rankings were released, one by CWTS and one by Times Higher Education. Ludo Waltman and Nees Jan van Eck, responsible for the CWTS Leiden Ranking, use this occasion to discuss the importance of transparency of rankings.

Ludo Waltman + 1 other • 09-10-2024

CWTS Development

Launch of the CWTS Leiden Ranking Open Edition 2024

Earlier this year CWTS published the first Open Edition of the CWTS Leiden Ranking. Today the Leiden Ranking Open Edition 2024 was launched. In this post, Nees Jan van Eck and colleagues discuss the latest developments around the Open Edition of the Leiden Ranking.

Nees Jan van Eck + 2 others • 09-10-2024

Opinion & Commentary

Bezuiniging op Open Science NL, superzonde!

Afgelopen week werd een forse bezuiniging op Open Science NL bekendgemaakt. Ludo Waltman, open science ambassadeur van Universiteit Leiden, bespreekt de gevolgen van deze bezuiniging.

Ludo Waltman • 25-09-2024

CWTS Development

Introducing the Leiden Ranking Open Edition

This post introduces the Open Edition of the CWTS Leiden Ranking, published today by CWTS in collaboration with the Curtin Open Knowledge Initiative, Sesame Open Science, and OurResearch. The Leiden Ranking Open Edition is the first fully transparent university ranking.

Ludo Waltman + 8 others • 30-01-2024

CWTS Development

Opening up the CWTS Leiden Ranking: Toward a decentralized and open model for data curation

Today, CWTS released the Open Edition of the Leiden Ranking. This blog post discusses the data curation approach taken in this fully transparent edition of the Leiden Ranking.

Nees Jan van Eck + 2 others • 30-01-2024

CWTS Development

An open approach for classifying research publications

In this post Nees Jan van Eck and Ludo Waltman introduce an open approach for classifying research publications, contributing to a broader development toward open approaches to bibliometrics.

Nees Jan van Eck + 1 other • 24-01-2024

STI 2023

Preprinting and open peer review at the STI 2023 conference: Evaluation of an open science experiment

At the STI 2023 conference, an experiment was performed with a more open approach to publication and peer review of conference submissions. In this post, the conference organisers present an evaluation of this experiment.

Ludo Waltman + 8 others • 18-12-2023

Science & Society

The Leiden Ranking goes beyond ranking

Today the CWTS Leiden Ranking and the INORMS More Than Our Rank initiative announce a new partnership, aimed at highlighting the accomplishments of universities beyond what is captured in university rankings.

Elizabeth Gadd + 2 others • 27-09-2023

CWTS Development

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 + 9 others • 21-06-2023