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…

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…

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.

Analysing the ways in which immigration structurally challenges and changes the organization and conceptual boundaries of national welfare states.

Next April, Leiden will host the seventh annual international Survival Analysis for Junior Researchers conference (SAfJR2018). This three-day event is aimed at career-young statisticians with an interest in the application and development of time-to-event analysis and related topics. The conference…

On March 12th, Jonathan Brown succesfully defended his doctoral thesis and graduated. The Leiden University Centre for Linguistics congratulates Jonathan on this great result.

The dental remains of 25 enslaved Africans from the site of Newton's Plantation, on Barbados, were subjected to isotope analysis. Previous research had pointed out that the locally born individuals were subjected to high concentrations of lead poisoning. A new study, done by Dr Jason Laffoon among others…

Religion is everywhere. Knowledge of religion is essential for anyone who wants to understand the world. Are you fascinated by the diversity of religions, their development throughout history and their meaning today?

The research programme Statistical Science is concerned with the analysis and interpretation of masses of data, the quantification of uncertainty using probability models, and the development and benchmarking of algorithms and methods with these aims.

Promotores: Prof.dr. G.A. Persoon & Prof. dr. H.H. de Iongh

To what extent are there differences between countries in and outside the European Union and the Schengen area in the level of crimmigration, the merger between migration control and crime control, and to what extent can these differences be explained by the way in which state and non-state actors in…

The aim of this study is to further develop the Open Science Monitor, which started as a pilot study.

This dissertation takes a technological approach to ceramic production and provides a fine-grained view of the circum-Caribbean region.

Promotores: Prof.dr. H.P. Spaink & Prof.dr. P.C.W. Hogendoorn, Co-promotor: Dr. M.J.M. Schaaf

Sarah Giest, Assistant Professor at Leiden Univeristy, researched the topic of regulatory and market structures that affect nudge implementation by private actors, captured by the ‘budge’ idea.

Cancer is considered the silent pandemic of the 21st century and the second leading cause of death worldwide.

The term “Lone Actor” has been applied to a variety of violent individuals who are thought to act out of ideological motivations using terrorist tactics.

Streptomyces bacteria are a valuable source of natural products, many of which are used in the clinic or in biotechnology.

This article assesses Russian rhetoric toward Ukraine from 2004 to 2019 by analyzing statements by the Russian Ministry of Foreign Affairs.

This study seeks to analyse how job stress could be the result of performing administrative tasks