Our group explores the larger domain of quantum measurement. In particular we investigate two themes that are closely connected: The detection of specially prepared quantum states of light and understanding and characterizing quantum photon detectors.

Rogier Kegge, Assistant Professor at the Institute of Public Law of Leiden University, was interviewed by Dutch newspaper de Volkskrant in response to the recent recommendations by Johan Remkes on how to approach the nitrogen crisis.

On 12 January 2022, Mirjam Franke defended the thesis 'Over de grens van de onrechtmatige daad'. The doctoral research was supervised by Prof. A.G. Castermans and Prof. J.H. Crijns.

On 25 November 2018, Laurens de Hoog defended his thesis 'De prioriteitsregel in het vermogensrecht'. The doctoral research was supervised by Prof. mr. W.G. Huijgen.

‘The storm of the passions rages’: The works of Johannes Jelgerhuis as a source of stagecraft for the historically informed performer.

This article investigates which factors most influence individuals’ decisions to engage in conversations about risk.

Supervisor: P.J.J. Hooykaas

Irene Moretti published the article Kin Enough in Social Analysis, The International Journal of Anthropology.

Understanding the water use of power production is an important step to both a sustainable energy transition and an improved understanding of water conservation measures. However, there are large differences across the literature that currently present barriers to decision making.

This project aims at describing the Khoisan languages !Ora (Korana/Griqua) and !Ui of South Africa.

Business Process Model and Notation (BPMN) has become the standard for business processes diagrams.

Transport inspectorates are looking for novel methods to identify dangerous behavior, ultimately to reduce risks associated to the movements of people and goods. We explore a data-driven approach to arrive at smart inspections of vehicles.

Political institution (like the Council of the European Union and the European Parliament) generate large bodies of text. These great amounts of text can impossibly be read by a researcher. Contrary to human researchers, computers are able to read thousands of documents a day. In this research project…

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.

Insights in diet, climate and ecology

What are the rights of migrants in Morocco and how do this receiving state and migrants deal with them in practice?

This case study-based textbook in multivariate analysis for advanced students in the humanities emphasizes descriptive, exploratory analyses of various types of data sets from a wide range of sub-disciplines, promoting the use of multivariate analysis and illustrating its wide applicability. Fields…

Festival

Discover the new MSc in Public Sector Economics at Leiden University, offered entirely in Dutch. This program prepares future policy economists by bridging economic theory, Dutch institutions, and real-world policy challenges. Starting September 2025 in The Hague, it focuses on key issues like inequality,…

The Netherlands sees thorny dilemmas placed with regard to the conviction of returning IS fighters. The Netherlands, like the other EU member states, does not respond to the Kurds' wish to take back 'their' Syrian people. Bart Schuurman, terrorism expert, states that an international tribunal, flanked…

Deze onderzoeksgroep richt zich op het thema ondermijning en financieel-economische criminaliteit, in het bijzonder de aanpak ervan op een aantal deelterreinen.

A Spanish translation of Herman Paul’s 'Key Issues in Historical Theory' has appeared under the title 'La llamada del pasado: claves de la teoría de la historia'.

PhD defence

Tot voor kort was de kartering van oppervlaktevondsten de geijkte manier om het in de bronstijd bewoonde gebied in West-Friesland in kaart te brengen. In dit rapport gebaseerd op archeologisch onderzoek in 2012-2015 wordt uiteengezet wat de relatie tussen de oppervlaktevondsten en de aan- en afwezigheid…

Survival Analysis for Junior Researchers 2018 was hosted in Leiden.

Animal diet studies are critical for understanding ecological processes such as trophic interactions, energy flow, and nutrient cycling. By examining what animals consume, ecologists gain insights into species specialization, predator-prey relationships, and ecosystem management.

The article 'Standardising care of the dying: An ethnographic analysis of the Liverpool Care Pathway in England and the Netherlands' by Erica Borgstrom and Natashe Lemos Dekker is published in Sociology of Health & Illness.

Our previous meta-analysis (Swart et al., 2019) had shown that feedback targeting text comprehension given when students perform a reading task positively influences learning from text. So far, differences in the effects of feedback were explained by design features, such as the timing and richness…

Perec’s Lieux project consists of texts describing the author's places of memory, photographs, personal documents and ephemera collected in the street.

Ceramides (CERs), cholesterol, and free fatty acids (FFAs) are the main lipid classes in human stratum corneum (SC, outermost skin layer), but no studies report on the detailed analysis of these classes in a single platform.

Currently, more than 80% of drugs are used in an off-label manner in critically ill neonates.