Skip to main content

GraspOS: Connecting Assessment Reform and Open Science


12 November 2025, 11:15-11:35

Ludo Waltman, Center for Science and Technology
Studies, Leiden University

In this talk, Ludo Waltman will discuss connections between research assessment reform and open science, two areas that both appear prominently on science policy agendas in Europe and beyond. Ludo will highlight key ideas in the areas of assessment reform and open science, and will explore the connections between these ideas. Within this broader context, Ludo will position the GraspOS project and will outline the key objectives of the project.


Ludo Waltman is scientific director and professor of Quantitative Science Studies at the Centre for Science and Technology Studies (CWTS) at Leiden University. He is co-chair of the Research on Research Institute (RoRI). Ludo’s work focuses on studying and developing infrastructures, algorithms, and tools to support research assessment, science policy, and scholarly communication. Ludo is open science ambassador of Leiden University, president of ASAPbio, and one of the initiators of the Barcelona Declaration on Open Research Information. Together with his colleague Nees Jan van Eck, Ludo has developed the well-known VOSviewer software for bibliometric visualization. Ludo serves as Editor-in-Chief of the MetaROR (MetaResearch Open Review) platform. Previously he was Editor-in-Chief of the journal Quantitative Science Studies.