The unemployment replacement rate data set, assembled by Olaf Van Vliet & Koen Caminada (version 1, January 2012), provides data on unemployment benefit schemes in 34 welfare states from the 1970s until 2009. The current data set includes all 27 member states of the European Union and 7 non-EU OECD…

What are the 'dark' components of the universe?

We are a dynamic research group at the Leiden Institute of Physics. Our aim is to explore and understand quantum materials, including strange metals, high-temperature superconductors, and quantum critical electron matter.

On 24 January 2024, Vethaak defended the thesis 'Empirical Analysis of Social Insurance, Work Incentives and Employment Outcomes'. The doctoral research was supervised by Koen Caminada and Pierre Koning.

The Faculty of Governance and Global Affairs is one of a total of seven faculties of Leiden University, located in The Hague.

We are interested in understanding the mechanics of soft materials, of which biological materials are prominent examples.

The Leiden Papyrological Institute offers several courses in papyrology, from beginners to advanced level, BA as well as MA. The courses are taught by Dr. Koen Donker van Heel (Demotic and Abnormal Hieratic papyrology) and Dr. Joanne Stolk (Greek and Coptic papyrology).

Hieratic Papyrology

Cooperation on education with China stimulates innovation and brings a different perspective and new content to classrooms.

What is a university without its students? In 2025, we will celebrate 450 years of studying with an exhibition that puts our students from the past centuries in the spotlight. How did they study in the past? And how do they study now? The outdoor exhibition will be on display from 23 April at the Hortus…

Papyrology+, founded in 2014, is a collaboration of Leiden scholars studying (Abnormal) Hieratic, Demotic, Aramaic, Greek, Latin, Coptic, and Arabic papyri from a socio-historical, economic and linguistic perspective. Papyrology+ aims to explore new opportunities and directions in the study of ancient…

Computers are capable of making incredibly accurate predictions on the basis of machine learning. In other words, these computers can learn without intervention once they have been pre-programmed by humans. At LIACS, we explore and push the borders of what a revolutionary new generation of algorithms…

In 2017, at the start of the Rutte III cabinet, tax scholars Leo Stevens and Koen Caminada presented a blueprint for a new tax system. Today, four years on, they observe that the cabinet has put little effort into innovations in the area of tax.

Een uitbreiding van de NIMAR collectie van de Universitaire bibliotheken Leiden.

Are you in need of some rest, stressed about an exam, or feeling under the weather? Since a few months you can find Mindfulnest at the Science Faculty. Assessor Ava Bauer and student psychologists Petra Penning and Koen Linders explain what the Mindfulnest can mean for you.

Astronomer Koen Kuijken and physicist Tjerk Oosterkamp have each been awarded a major subsidy by NWO. The funding will allow them to construct new research facilities.

During the Faculty of Science New Year's reception, Daniël Rozen was named Discoverer of the year 2015. Nienke van der Marel and Koen van der Maaden both won the prize for the best dissertation and Jeroen van Smeden was named Best Teacher of 2015.

At the beginning of this year CADS Lecturer Koen Suidgeest published his photobook Why I Cry on Airplanes. In this book he takes you on a visual flight around the globe to meet resilient human beings who live under challenging conditions. He decided to use the changing situation that COVID-19 causes…

Overview of the main research projects at the Leiden Papyrological Institute.

Dirk Uittenbogaard, a student on the Delft-Leiden Master’s in Industrial Ecology, has won a gold medal for rowing at the Olympic Games in Tokyo. Uittenbogaard took gold in the men’s quadruple sculls, together with Abe Wiersma, Tone Wieten and Koen Metsemakers.

On Thursday 28 September, the Committee on Social Minimum, of which Koen Caminada is a member, presented its second report to outgoing minister for poverty policy in the Netherlands, Carola Schouten. The Committee was established by the minister at the request of the House of Representatives.

Wat betekent belastinghervorming in de VS? Hoe groot is de invloed van belastingontwijkende multinationals op belastingconcurrentie in ontwikkelde en ontwikkelingslanden? En wat zijn de problemen met belastinguitgaven? Op 7 november vindt een GLOBTAXGOV-T20-seminar plaats op de Campus Den Haag van de…

Researchers from the department of Economics – Marike Knoef, Kees Goudswaard, Koen Caminada, Jim Been en Lieke Kools- have been awarded a major subsidy provided by Netspar. Netspar is a scientific knowledge network which is dedicated to promote a better understanding of the economic and social impact…

Korea specialist Koen De Ceuster has combined 1200 posters from North Korea in one database. He believes the posters are extremely valuable for researchers who want to make a more in-depth study of this closed country. The database will be launched on 15 June in Leiden.

An international team of astronomers, including Professor Koen Kuijken, has published a series of online articles presenting the first results of a major search for dark matter. Never before have researchers been able to chart so precisely the characteristics of groups of galaxies and their dark matter.…

Why are morpho butterflies blue? That is what high school students Frederique Kerstens and Koen van Griensven investigated in their high school profile paper at the Leiden Institute for Research in Physics. In doing so, they won the KHMW Profielwerkstukprijs 2023. ‘We didn't expect it, but are of course…

How can KLM remain the most sustainable airline? Master’s students from the Leiden Leadership Programme immerse themselves in practice and advise companies on major issues.

Op 4 oktober vindt op de Vrije Universiteit het symposium "Kronieken, 1400-1850" plaats. Dit symposium wordt georganiseerd ter ere van het verschijnen van de handelseditie van het proefschrift van Peter Bakker. Drie VU-historici belichten hun onderzoek naar dit onderwerp vanuit verschillende hoeken.…

Op 14 oktober 2021 verschijnt "Metamorfose van Stad en Devotie". Het gaat om een handeleditie van de dissertatie van wijlen Bas de Melker over het Amsterdam van de jaren 1385-1435. De dissertatie zelf wordt uitgegeven naar de tekst van Bas de Melker uit 2002, maar er is een epiloog aangehangen over…

Proud. We did it. All the Ginis. Open Access. Income inequality and Fiscal Redistribution in 47 countries 1967-2014.

Koen Bastiaans and his colleagues discovered a new quantum liquid unlike anything ever seen. They did it by using a technique that can be compared to listening to the sound of raindrops falling on a roof. Publication in Science 29 October.

In a lot of research on education, general didactic principles are applied to a particular area of study. ‘But every field of study also has its own ways of thinking’, argues professor Fred Janssen. ‘If you can identify those ways of thinking, then you have a lot of indicators for how you can best organise…

The organising committee of the congress 'Social Benefits of Higher Education' has decided to postpone the congress.

Research and education at the Leiden Institute of Chemistry is overseen by the Institute Board. The Board and representatives of the two research themes form the Management Team. The Scientific Council (WERA), the Institute Council (I-Raad) and the platform for PhDs and post-doctoral co-workers (LIC73)…

International organisations that represent collaborations between States are becoming increasingly more powerful, and they have an increasing impact on our daily lives. For example, the European Court of Human Rights in Strasburg established that minors have a right to legal aid immediately following…

An overview of awards and prizes granted to our staff and students in 2022, as well as special appointments at Leiden University and other institutions.

Read about experiences of former students.

In the master’s specialisation in Economic and Consumer Psychology, students will study the psychological mechanisms that underlie many of our choices and decisions concerning consumption and other economic behaviours.

On Monday 26 February the terrible news reached us that our gifted former Egyptology student – and former student assistant at the Leids Papyrologisch Instituut – Juan Archidona Ramírez had succumbed to cancer.

On February 2nd, 2018, Professor Sven P. Vleeming of Trier University was presented with a ‘Festschrift’ to celebrate his retirement last summer. The book was presented to him, in the presence of friends and colleagues from the Netherlands and abroad, by the editors: his former Leiden colleagues Koen…

In the period 1977–2020, the purchasing power of the Dutch population increased by 58 percent. The sharpest rise occurred from 1999–2009 (22 percent). This is the outcome of research conducted by Leiden University and Statistics Netherlands (CBS).

Marike Knoef has won an award on the 34th Award Ceremony of the World Cultural Council (WCC).

A large delegation composed of 11 delegates from institutes from the Faculty of Science has made an extensive visit to China and enhanced Leiden’s influence in the Chinese academia, industry and local government.

UBL, Leiden University Libraries, is doing all it can to continue to offer its services. Even now the motto is, ‘work from home’. Who is doing want and how are things going?

The two instruments of ESA's space telescope Euclid have taken their first test images. The first images indicate that the space telescope will achieve the scientific goals for which it was designed - and possibly much more. Euclid will create a 3D map of a third of the sky, allowing scientists to study…

New results from the Kilo-Degree Survey (KiDS) show that the Universe is almost 10 percent more homogeneous than previously thought. The new KiDS map was created using the partly Dutch OmegaCAM on ESO's VLT Survey Telescope on Cerro Paranal in Northern Chile. An international team of astronomers from,…

Bringing research and teaching closer together is part of the mission of Leiden University. The 'Career Policy for Academic Staff' working group that has draw up new guidelines for appointing academic staff discovered that the University has many members of staff who do not conduct research.

EL CID has started! This is the week when new students have the chance to get to know the city and student life. Some of the mentors and first-years introduce themselves.

Leiden Observatory is going to use a new technique to carry out calculations on gravitational lensing measurements. They will do this is the context of research into the formation of elliptical galaxies. Alessandro Sonnenfeld (University of Tokyo) who developed this technique joined the research team…

Cells in our body are constantly performing small tasks, such as repairing wounds. They exert force by changing shape. But how do cells translate their shape into exerting a force in a specific direction? Experimental and theoretical Leiden physicists have now found a clue to answer this question. Cells’…