Five years ago, we welcomed you to Leiden Madtrics through our first blog post. With the new blog, we wished to establish an active and engaging platform for our institute and our field to express ourselves – other than through scientific publications.

The Times Higher Education (THE) World University Rankings 2025, published today, includes 12 Dutch universities, of which five are ranked in the top 100 worldwide. One prominent Dutch university, Utrecht University, is not included in the ranking. Last year this university decided to discontinue submitting data to the THE World University Rankings.

The release of the first Open Edition of the CWTS Leiden Ranking in January this year triggered an overwhelming response. It was covered by various news media, including Research Professional, AEF info, and TheMetaNews, and was endorsed by important stakeholders such as the International Science Council, the French Committee for Open Science, and the National Agency for Research and Development in Chile.

English version below . Vorige week werd in de Rijksbegroting een halvering van het budget van Open Science NL aangekondigd. Open Science NL, een zogeheten regieorgaan van NWO, heeft als opdracht om de transitie naar open science in Nederland te stimuleren en versnellen, met als doel dat open science de norm wordt.

The 28th International Conference on Science, Technology and Innovation Indicators (STI) 2024 is just around the corner, set to take place in Berlin on 18-20 September!

Over the past decade, a growing number of bibliometric analyses of varying quality have been published in the peer-reviewed literature. Despite this growth, surprisingly few published articles provide guidance on how a bibliometric analysis ought to be reported. Moreover, to our knowledge, these articles have been written based on the opinions/experiences of different researchers, as opposed to best evidence-informed practices.

A broad landscape of open research information systems The landscape of open research information systems is broad. In addition to large (and global) open data sources like OpenAlex, OpenAIRE, or PubMed, we also have local or regional open data sources like SciELO, Redalyc or LaReferencia.

The origin of the phrase "publish or perish" was first questioned by Eugene Garfield (1996). He wrote that he had used the phrase in his speeches for thirty years, but had not heard anything about its origin. He consulted professors, librarians, dictionaries, and the Internet, but never found out who first suggested the phrase.

Introduction On August 21, 2022, we made available the first version of our dataset of scholars on Twitter created with two open data sources: Crossref Event Data and OpenAlex.

The Barcelona Declaration: a call for openness… but also for diversity and inclusion The launch of the Barcelona Declaration last week aims to mobilise the global research community towards making research information open and accessible.

Open Science at CWTS in retrospect Leiden University sees Open Science (OS) as a key element on the path towards making greater scientific and societal impact and fostering research quality and integrity.