Leiden LIS Budget Incidence Fiscal Redistribution Dataset on Income Inequality (2017), assembled by Jinxian Wang and Koen Caminada (Version 1, November 2017), presents the disentanglement of income inequality and the redistributive effect of social transfers and income taxes in 47 LIS countries for…

Hieratic Papyrology

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.

Promotor: K.H. Kuijken

The Sun and all the stars in the night sky reside in the Milky Way galaxy. In the at-rest reference frame of the Galaxy, typical stars travel with velocities of about 100-200 kilometres per second.

The Women of Ramesside Deir al-Medina

These are our lecturers (in alphabetical order) for the 2025 Summer School in Languages and Linguistics.

Caminada et al. examine elderly poverty across 16 European countries (2005-2022).

Friso Stevens, External PhD candidate at the Institute of Security and Global Affairs (ISGA) at Leiden University, wrote in de Volkskrant on the Chinese investment drive.

Food waste is a defining inefficiency of the modern food system, with profound implications for resource use, climate change, and circular economy transitions. This dissertation examines food waste through two complementary lenses: the prevention of avoidable food waste and the valorization of unavoidable…

Decarbonizing the building stock is critical for realizing the climate-neutral target for the Netherlands.

In an (Dutch) interview with the regional Leiden newspaper “Leidsch Dagblad”, Ruben Huele and Ester van der Voet talk about the recently started project PUMA (Prospecting the Urban Mines of Amsterdam).

On 22–24 October 2025, Leiden University welcomed scholars, policymakers and higher education leaders for the Una Europa Conference on Academic Freedom. Organised by the AFITE project team and supported by Una Europa Seed Funding 2024, the three-day programme examined current pressures on academic freedom…

This book rovides an economic history of Portugal over the course of eight centuries, from 1143 through to 2010 and situates Portugal's economic growth within the context of European development. It also responds to fundamental questions about when, how and why the economy expanded, stagnated or co…

Nederland Circulair! is organising the week of the circular economy, for the second time. This is a great setting for Leiden University to promote several of the university’s circular initiatives. We will kick off with an initiative by alumna Noortje Schrauwen: Raw material beachcombing.

Of all the mass in our Universe, 80% is thought to consist of a hypothetical and invisible substance called dark matter (DM).

Galaxy intrinsic alignments induce a major astrophysical contamination to weak gravitational lensing measurements and need to be modelled and mitigated when extracting cosmological information from such measurements.

The institute is funded by the Ministries of Education, Culture and Science and of Foreign Affairs and by Leiden University. To safeguard the institute’s independence and interests in Morocco, it is part of the Netherlands Embassy in Rabat under Moroccan law. The institute performs its tasks under the…

Galaxies form and live inside dark matter haloes. As a consequence, they are exposed to the tidal fields generated by the surrounding matter distribution: this imprints a preferential direction to the galaxy shapes, which leads to a coherent alignment on physically close galaxies, called intrinsic a…

The high velocity tail of the total velocity distribution of stars provides essential insight into fundamental properties of the Galaxy.

Just published:

In astronomy, the interpration of observations and measurements plays a crucial role: we rely purely and fundamentally on the information that reaches us as observers. And 80% of all matter in the universe is undetectable directly.

The physical origin of the dozens of stellar-mass binaries, the mergers of which have been detected by the LIGO-Virgo-KAGRA collaboration via gravitational waves, is still unknown.

Promotor: Koen Kuijken Co-promotor: Henk Hoekstra

Dark matter is one of the biggest mysteries of the Universe. Its properties cannot be explained with the known laws of physics and elementary particles.

Promotor: Prof.dr. K.H. Kuijken, Co-Promotor: Dr. H.Hoekstra

We explored the Universe using weak gravitational lensing, a phenomenon that occurs when light from distant galaxies is bent by the gravitational fields of closer cosmic objects, much like how a lens distorts light.

In this thesis, the research focuses on the properties of dark matter and dark matter haloes and how they connect with the galaxies we can observe in the Universe.

A warm welcome to the Graduate School of FGGA at Leiden University.

One of the most important puzzles in modern astrophysics is the nature of dark matter.

Promotor: K. Kuijken, Co-Promotor: H. Hoekstra

On 9 January 2020, Christa Tobler gave a presentation which was followed by a discussion, which was announced as follows:

Introductory courses, Seminars and Minor Economics and Dual Programs

Material circularity and energy efficiency are highly relevant and intertwined issues for the transition towards a carbon-neutral and circular built environment. In the Netherlands, the building sector has been rendered a priority towards a circular and low-carbon society.

On November 19th, Dirk-Jan Kok, PhD-candidate at CML, will set course for Martinique on tallship the Morgenster. With 18 other motivated individuals, they will form the think tank that aims to come up with creative solutions to the problems that the industry faces in transitioning to circular economic…

Dutch Central Bank President Klaas Knot wants to wind down the European Central Bank’s crisis bond-buying programme this year because the economic outlook is looking increasingly positive.