The main topic of this PhD thesis is the Arakelov ray class group of a number field, an algebraic object that contains both the ideal class group structure and the unit group structure.

Scientific research on Colonialism and Slavery is done from different research programmes and different disciplines.

Optical cavities are useful tools to enhance the interaction between light and matter, which is important to make good quantum emitters. However, it turns out that the cavities themselves (without any quantum emitters) are already interesting objects to study.

Education in Environmental Biology

The State & Society network critically interrogates the assumption that state and society are a priori conceptual and empirical objects.

LIAS aims to advance the globally conscious vision of area studies, both within and outside the academic community. Focusing on Asia and the Middle East, the institute is a meeting place of multiple fields of inquiry, theories and methods, historical periods, and areas.

Jelke Bethlehem (Leiden University, Institute of Political Science) gives an overview of many aspects of polls: questionnaire design, sample selection, estimation, margins of error, nonresponse and weighting. As such, it is useful both for readers who want to gain a better understanding of the ins and…

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The Game Research Lab (GRL) uses digital games as a medium for academic research, and consider ‘serious’ games and entertainment games equally valuable objects of study.

LIAS aims to advance the globally conscious vision of area studies, both within and outside the academic community. Focusing on Asia and the Middle East, the institute is a meeting place of multiple fields of inquiry, theories and methods, historical periods, and areas.

Formulation of biopharmaceuticals

LIAS aims to advance the globally conscious vision of area studies, both within and outside the academic community. Focusing on Asia and the Middle East, the institute is a meeting place of multiple fields of inquiry, theories and methods, historical periods, and areas.

The Science, Management and Innovation (SMI) group examines organisational dynamics governing the management of complex R&D projects and technology commercialisation.

Political scientists Rebekah Tromble and Michael Meffert (Leiden University) address the question why certain frames persist over time in the media while others fade away and still others disappear very quickly. They suggest an approach based in event-history methodologies for assessing the causes of…

International organisations face the challenge of balancing conflicting norms. For instance the norms governing traditional UN peacekeeping missions and the the norm of international criminal accountability. Political scientists Tom Buitelaar (Leiden University) and Gisela Hirschmann (Leiden University)…

Heightened activation of the striatum that adolescents show in response to reward is often associated with risk-taking and negative health consequences. This article in Nature Communications investigates a potential positive side of this heightened activation. It shows that the activity peak in late…

Prospective students are recommended to have completed a minimum of one year of university education (not necessarily in law or economics). Proficiency in English, both verbal and written, is expected.

Religion is everywhere. Knowledge of religion is essential for anyone who wants to understand the world. If you are fascinated by the diversity of religions, their development throughout history and their meaning today – both in people’s personal lives and in society – the minor Religion in a Changing…

Some of the courses are both part of the minor AI and Society and the minor Internetrecht. Completed courses only count towards one minor certificate.

Leiden Law School offers an extensive range of English-taught law courses at undergraduate level. These are open to both Dutch and international students alike, giving them a truly international flavour.

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These courses address all language skills: speaking, writing, listening and reading.

Do humans have free will? Does the world look different than it really is? Can moral judgements be right or wrong? In the Dutch-taught Bachelor's programme Philosophy at Leiden University you will ask questions that cross different disciplines and you will study the theories of classical thinkers,…

Knowledge and culture subproject 1:

The relationship between States and foreign corporations are regulated by international economic law and international investment law in particular. Any disputes between States and foreign corporations must therefore also be solved by reference to this body of public international law, for example when…

This is an Erasmus+ International Credit Mobility project of Leiden University Medical Center with the Anton de Kom University of Suriname.

The research programme Language Use in Past and Present brings together linguists within LUCL whose central focus is both on actual language data, including language use in earlier stages of the language, and, taking a variationist perspective, on language change in various aspects.

The project re-examines the role of the Catholic, Protestant and Orthodox missionaries in the cultural and social developments of the Middle East and their interactions with the indigenous communities, from the nineteenth century until today. It seeks to discover and retrace such ‘entangled histories’…

The master's specialisation Methodology and Statistics in Psychology includes courses, a thesis and an internship. Teaching takes place in the form of seminars and small-group lectures and practicals, and is assessed primarily by written coursework and reports of empirical projects carried out individually…

The combination of academic and professional skills taught in the CSM prepares you for a wide variety of careers in the rapidly expanding domain of security and crisis management, including public or private sector and policy-making positions.

This is an Erasmus+ International Credit Mobility project of Leiden University’s Faculty of Science with the Ethiopian Space Science and Technology Institute.

How do you involve a local community to tackle biodiversity loss? How do you create awareness and political movement on climate change? And how do you find a balance between environmental impacts and economic needs when it comes to pollution? These are examples of core questions at the heart of a new…

How can we understand the drum-set – and thus drummer – as technological? How have technological developments affected change in drum-set performance and drum-set construction? Are the relationships between new technologies and the drummer symbiotic, or one way? To what extent are instruments and (reactive)…

Research in the arts at the Academy of Creative and Performing Arts (ACPA)  

The aim of the research programme is to provide insight into the cognitive processes and brain mechanisms that underlie reading, arithmetic and learning in general.

The main goal of the research that is conducted in the Brain and Education Lab is to create a better understanding of the cognitive and neural systems that support learning and academic performance across development. To pursue this goal, lab members draw on theories and methods from developmental and…

How did dynastic organization – that it, the employment of non-ruling family members and the development of dynastic traditions and concepts – influence state formation in both Catholic Europe and Muslim West-Asia?

On 18 September 2019, Huw Llewellyn defended his thesis 'An Institutional Perspective on the United Nations Criminal Tribunals: Governance, Independence and Impartiality'. The doctoral research was supervised by Prof. N.M. Blokker and Prof. L.J. van den Herik.

Explaining the origins , patterns and outcomes of crisis management efforts.

Leiden University has locations in both Leiden and The Hague.

In deep reinforcement learning, searching and learning techniques are two important components. They can be used independently and in combination to deal with different problems in AI, and have achieved impressive results in game playing and robotics. These results have inspired research into artificial…

How do processes of coalition-formation influence patterns of decision-making in the European Union?