The starting hypothesis of the project is that secrecy is not always inimical to democratic governance as conventional wisdom has it.

Hoye proposes that concerns about virtues of the sovereign are essential for understanding Hobbes's both his political thinking and his political critique.

Whether you have an idea, a question, or a general sense of curiosity, we’d love to hear from you.

De Pagus Renensis van de 4de tot de 8ste eeuw na Chr.: Een archeologische synthese

On 18 November 2020, Mojan Samadi defended her thesis 'Normering en toezicht in de opsporing'. The doctoral research was supervised by Prof. J.H. Crijns.

On 17 January 2024 Ying Wang successfully defended a doctoral thesis and graduated.

It is integral to many cluster members’ research to use Medieval and Early Modern Arts as a lens for studying the medieval and early modern periods at large:

Climate Proofing Industrial Estates: Entrepreneurs’s Participation in the City of Leiden

Welcome to the PhD Portal of LIACS! Below you find information on the PhD coordinator, the PQRS programme, and the PhD coach

The sentencing decision of the judge might be the most important decision in the criminal proceedings, not only because of the impact the punishment has on the offender, but also because the sentencing decision is a cornerstone of the legitimacy of the entire criminal justice system.

The research of the unit is aimed at the development of models to explain and describe the influences in social systems. Social influences are studied in three ways: from the perspective of group dynamics, from an individual-cognitive perspective, and from an economic and consumer psychological pers…

General information

Climate Proofing the Neighbourhood: Evaluating Citizen’s Participation in the City of Leiden

Many internal and external parties are involved in the expansion of the Gorlaeus Building.

This dissertation contains a detailed description of the Carib language, including the most extensive dictionary of the language to date. This knowledge is based on work from earlier sources and field work which was carried out by the author over a ten-year period, particularly in Galibi, a Carib village…

European countries struggling how to deal with the issue of returning foreign fighters, women and children from the Caliphate.

This study presents a full descriptive account of the grammar of Mualang, covering the major features of phonology and morphosyntax as well as issues related to pragmatics.

The availability of indicators based on social media has opened the possibility to track the online interactions between social media users and scholarly entities.

Bandura Witharana defended his thesis on 27 September 2018

This collection considers such issues as the cognitive, linguistic and emotional benefits of speaking two languages, the perceptions, attitudes and issues relating to identity in minority language areas, and the number of grammatical aspects amongst those who speak these minority languages.

Jurisprudence

If you still have questions and would you like to talk to someone about them, Leiden University offers the following options.

The Applied Mathematics Programme consists of 120 European Credit Transfer System (EC) points. The programme consists of advanced courses (min 60 EC), a research project (40 EC) and electives (max 20 EC).

This book is part of a series which sets out a restatement of labour law in Europe. Its second volume looks at atypical employment relationships in Europe.

This dissertation explores the relationship among creditors in sovereign debt restructuring and specifically focuses on the issue of inter-creditor equity.

On 8 October 2020, Kartica van der Zon defended her thesis 'Pleegrechten voor kinderen'. The doctoral research was supervised by Prof. M.R. Bruning and Prof. T. Liefaard.

In 2018, the number of mobile phone users will reach about 4.9 billion. Assuming an average of 5 photos taken per day using the built-in cameras would result in about 9 trillion photos annually.

A monthly seminar on complex networks, aimed at scientists from all disciplines.

This article investigates the sources of legitimacy in multistakeholderism as a major alternative approach to intergovernmental global governance.

This volume contributes to the scholarly debate regarding the reception of Cicero and focuses on one particular moment in Cicero’s life: the period from Caesar's death (March 44 BCE) up to Cicero’s own death (December 43 BCE).

Leiden Law School has a methods portal that offers an overview of the various phases of empirical legal research.

Marieke Liem en Edwin Bakker have published an article in the Dutch Magazine Criminology. The article tells us the following:

This thesis describes the development of improved formulations and alternative delivery strategies for polio vaccination.

In this thesis, we use low-frequency and high-frequency radio observations to address the following questions regarding quasars: is the radio loud/quiet quasar dichotomy real?

In this research project, the protection of personal data is compared in eight EU member states: France, Germany, the UK, Ireland, Romania, Italy, Sweden and the Netherlands. The comparison of the countries is focused on government policies for the protection of personal data, the applicable laws and…

The recent terrorist attacks in Europe are presumably not just acts committed by individuals, but acts facilitated by larger jihadist networks. But how do such networks operate? Understanding their modus operandi can be useful knowledge to counter terrorist threats.

On December 13th, Maaike van Naerssen succesfully defended her doctoral thesis and graduated. The Leiden University Centre for Linguistics congratulates Maaike on this great result.

Scholars have long debated the intentions of the Muslim Brotherhood in the Middle East. Some claim the organization supports terrorism, while others believe it is a positive force for democratization.

On the 26th of May Sudarmoko successfully defended a doctoral thesis and graduated.

On the 25th of September, Alzenir Mendes Martins de Menezes successfully defended a doctoral thesis. Leiden University Centre for Linguistics congratulates Alzenir on this achievement!

Central in this thesis are the various forms the research-teaching nexus can take in the university, especially in the Faculty of Humanities. The importance of a strong relation between research and teaching is advocated by many academics, but debate is going on about the forms this strenghthened relation…

Since the Second World War, intelligence and security services have played an important role in policy and decision making, particularly with regards to a state’s national security. In this minor programme we study both the organisations, their working methods, their analysis techniques, as well as…

Do you have any questions about the master's specialisation Clinical Neuropsychology? Please contact us.

Holtz defended her dissertation ‘Collective human rights as an (onto)logical solution to climate change: reconceptualizing, applying and proceduralizing an overlooked category of human rights’ on 16 October 2025. The doctoral research was supervised by Carsten Stahn and Daniëlla Dam-de Jong.

Discover the other talented students who were nominated for this year’s award.

This report examines the questions

Promotor: Prof.dr. H. J. A. Röttgering, Co-Promotor: Dr. M. Haverkorn

The Mathematics and Algebra, Geometry and Number Theory specialisation programme consists of 120 European Credit Transfer System (EC) points and includes a research project (40 EC), advanced courses (min 60 EC) and electives (maximum 20 EC). 30 EC are to be taken from the Dutch national Mastermath p…