In the first part, we introduce a new condition, called toric-additivity, on a family of abelian varieties degenerating to a semi-abelian scheme over a normal crossing divisor.

On 29 June 2017, Doris Dull-Zessner defended her PhD dissertation “Value Congruence in a Multinational Corporation”. The supervisors are Professor J.A.A. Adriaanse and Professor J.I. van der Rest.

How were (post) colonial migrants included in post-war welfare systems?

Is online radicalisation is an analytically useful concept when discussing contemporary cases of terrorism?

How is the effect of kleptocracy on foreign policy change mediated by the political-administrative relationship?

How does the design of online participation platforms influence the inclusivity of online direct participation?

What political factors affect the speed or duration of EU legislative decision-making?

Promotores: J.J.M.M. Rutten, F.S. de Boer, Co-promotor: M.M. Bonsangue

Has there been continuity or change in US counterterrorism policy since 9/11? What factors led to the continuity or change, and how do we classify any such continuity or change?

How do leadership behaviour repertoires take shape in public organizations?

The function of TLRs in innate immunity has aroused worldwide attention soon after its discovery. Because of the broad functions of TLR2 in innate immunity, the drive for the development of TLR2-targeted vaccines or therapeutic treatments has accelerated in the last decades.

How have the armed forces of the United Kingdom, the Netherlands and Belgium adapted to the OMLT task in Afghanistan, and what institutional changes have materialised as a consequence of this adaptation?

What factors can explain the dynamics of de facto statehood in Iraqi Kurdistan at internal, national and international levels? What has been the nature of the de facto statehood in Kurdistan since its inception?

On 10 October 2019, Janneke Vink defended her thesis 'The Open Society and Its Animals'. The doctoral research was supervised by Prof. P.B. Cliteur.

This article investigates how parenthood serves as a critical turning point for young people in Latin America, influencing their criminal trajectories.

What drives the behaviour of accountability forums?

How does open government affect the level of public trust?

Carsten Stahn has just published Confronting Colonial Objects: Histories, Legalities and Access to Culture. The book is part of the OUP Cultural Heritage Law and Policy Series.

The aim of this dissertation is to provide insight in interethnic prejudice of children in the Netherlands and attitudes and ideologies that they are exposed to through two socialization agents (parents and children’s books).

In this article, Seda Gürkan, Özlem Atikcan and George Christou examine how EU institutions responded to Turkey’s democratic decline between 2014 and 2024, analysing how conditionality was framed and applied by the European Commission, European Parliament and European Council.

Many primary school children suffer from anxiety and their numbers are increasing. Psychologists from the Knowledge Center Anxiety & Stress (KAS) are developing and researching preventive training.

Completing your Master’s in Biology gives you an internationally recognised degree which you can follow up with a PhD track. With your acquainted skills, you’re a much requested professional in and outside research.

After graduation you are well equipped to start a career in evolutionary research or to take the responsibility for projects in an industrial or institutional research environment.

The European Football Championship for Women, in the Netherlands this summer, is the background for a large and innovative data research project. The Dutch football union is working together with Leiden University and Sportinnovator. The research is expected to uncover links that have thus far remained…

What is leadership? Can it be taught, and if so, how? The International Leiden Leadership Programme (ILLP) helps students find their own style, say ILLP graduate Marko Simovski and his former coach Annah Neve in an interview: 'It’s about you, discovering you.'

We are looking for students who are 16 years or older and are studying at a Dutch mbo, hbo or university. Our aim is to gain insight into the needs and perceptions of students regarding stress and burnout. In short, we aim to carefully listen to the students’ needs: how can we help you?

PhD candidates are encouraged to start thinking about job prospects well before the defence of their thesis. Many PhD graduates find employment in an academic or semi-academic environment.

When we think of politics, we tend to think of adversary, antagonism, polarisation, a struggle for power. But politics should serve positive purposes, as well. Political psychologist and meditation teacher Femke Bakker (Leiden University) thinks that positive politics is first and foremost about tolerance.…

Conceptualizing ceasefires as bargaining instruments challenges established ideas about the processes that lead up to conflict settlement, and about war re-emergence, with important implications for our understanding of war and peace.

The University wants its teaching and research to have the maximum academic, cultural, social and economic impact.

How can the problems in establishing a sustainable common security and defence mechanism for the EU be explained?

Underneath you find more information on how our faculty works.

Why do sexual violence policies still fail to systematically address men and masculinities, when the need for cultural change among men has been central in public debates since #MeToo?

In this research I assess the impact of the recently discovered gas reserves south off Cyprus on the escalation of the Cyprus conflict.

This dissertation aims to provide insight in ethnic prejudice in Chinese-Dutch children and the ethnic socialization context they are exposed to through three social-contextual factors, i.e., parents, children’s books, and the COVID pandemic.

Explore the MSc in Nationalism, Ethnic Conflict and Development at Leiden University: study governance and diversity, choose elective seminars, complete a thesis and optionally an internship.

The essay For progress has been published to mark the 450th Dies Natalis of Leiden University. In 2025, we are celebrating our 450th anniversary, and the theme of this special year is Ahead of the Times.

People who are often stressed can feel calmer by making certain adjustments to their breathing. Possibly this also positively affects concentration and attention. Psychologist Roderik Gerritsen studied the effects of breathing differently for the first time, and explains them. Gerritsen receives his…

Whether it's brushing up on a language, a course on current legal issues, or a master's degree in cybersecurity. Get inspired at the Online Open Day for Professionals on 2 November.

One of the ambitions of the Learning@LeidenUniversity vision on teaching and learning is to foster an international and inclusive educational community in which everyone feels welcome, regardless of religion, sex, sexual orientation or cultural background. One student service that promotes inclusion…

After graduation you have a lot of opportunities: academics are highly sought after in Dutch secondary education or mbo teaching. You can also aim for a management position or work as a researcher within the field of Biology.