Complex systems can be characterized as systems in which multiple components interact with each other, often in non-linear ways. The main goal of this research will be to investigate if and how the international tax system can be defined and modelled as a complex system. Approaching the international…

Tim Koopmans is one of the great minds in the history of Dutch and European legal scholarship. He taught law as a professor in Leiden and other universities, among which Ghent, Cambridge, Utrecht. He practiced it as a judge in the European Court of Justice and Advocate-General in the Dutch Supreme Court,…

Philosophy, Politics and Economics (PPE) in Leiden is a unique interdisciplinary master’s programme, considering topics of freedom, justice and citizenship in the 21st century. Watch this video to learn more about the programme!

On 19 juni 2018 Matthew Gillett defended his doctoral thesis ‘Prosecuting environmental harm before the international criminal court’. His supervisor is prof. dr. L.J. van den Herik.

Are you thinking about studying European and International Business Law? Learn more and watch the videos.

Are you thinking about studying European and International Human Rights Law? Learn more and watch the videos.

Are you thinking about studying this Advanced LL.M. International Dispute Settlement and Arbitration? Learn more and watch the videos.

Environmental scientist Rutger Hoekstra addressed the General Assembly of the United Nations on 12 April. And that’s quite a big thing to do. How do you get there as a scientist? And, more importantly, what was his message? In eight questions, Rutger explains what he does and why.

This master specialization offers you a combination of theories about learning problems and impairments and intervention and prevention strategies from a developmental perspective.

The International Institute of Air and Space Law (IIASL) offers PhD candidates the possibility to enroll in the IIASL PhD Track. It is designed for 'external' PhD candidates (buitenpromovendi), who seek to pursue a PhD in Air Law or Space Law while honouring their professional commitments in paralle…

Waarom is empirisch-juridisch onderzoek van belang voor de rechtspraktijk en het wetenschappelijke onderzoek? Op die vraag kregen masterstudenten van de afstudeerrichtingen civiel recht, ondernemingsrecht en financieel recht antwoord tijdens het congres over empirisch-juridisch onderzoek en het privaatrecht…

PhD defence

Jens Iverson, Assistant Professor of International Law and a Researcher in the Jus Post Bellum Project, defended his Ph.D. dissertation on 21 September 2017.

Peak Performance: Collaborative Crisis Management Before and During International Summits. This comparative case study probes into conditions for collaborative governance in the security organisation of international summits.

This book questions the accepted origins of the field of International Relations (IR). Commonly understood to have emerged from the horrors of WW1 with the goal of bringing about world peace, the authors argue that on the contrary, IR came from a somewhat less noble tradition – that of the Round Tab…

It appears that interest groups are increasingly finding their way to court or other ways of making use of the legal system as a means for societal change. Over the summer, Rowie Stolk, PhD candidate at the Department of Constitutional and Administrative Law was one of the speakers at the workshop ‘Legal…

The Executive Board has decided to appoint Marike Knoef as Professor of Empirical micro-economics, commencing January 2018.

Study information

Study information

The development of space resource activities is happening now. In the absence of a clear framework to govern these activities, there is a need to examine the concepts that are being discussed in order to ensure that they meet existing treaty obligations regarding on-orbit operations and space resource…

How can we assist Universitas Indonesia's department of International law to improve their educational and applied research programs on Transnational Law, Asset Recovery and International Investment Arbitration, with an eye on Indonesia’s security and rule of law reform agenda and the needs of the…

This inaugural lecture discusses the question: How to cooperate in the digital era?

ISBA2025

Population growth, economic expansion and the associated land use caused an increase in the number of bird species facing extinction and a reduction in carbon storage worldwide. These are the findings of an international team of scientists, also from the Leiden University Institute of Environmental…

This project aims to answer legally relevant questions in the field of consumer law by means of empirical research.

Leiden University’s new ‘Europe Hub’ is an interdisciplinary platform that showcases the university’s research and teaching expertise and capacities on Europe’s societal and governance challenges.

ELS@Leiden research encompasses a wide range of empirical-legal projects carried out within Leiden Law School from the perspective of multiple disciplines and methods. Here you can find the publications of our (former) lab members since the start of the Sector Plan.

Foreign investments in the Dutch East Indies during the colonial period could have been of more benefit to the Indonesian economy. Foreign investments in the Dutch East Indies during the colonial period could have been of more benefit to the Indonesian economy. But the complicated relationship between…

Company Law provides education and research in the field of commercial and corporate law, insolvency law and International Business Law.

Civil Law is a specialisation of the master’s programme Rechtsgeleerdheid (Law) at the renowned Leiden Law School of Leiden University.

Find out all you need to know about a visa and residence permit application with a member of the Admissions Office

On 5 July 2021, GTGC Chair Jan Aart Scholte moderated a panel on digital data governance during the 2021 Conference of the Society for the Advancement of Socio-Economics (SASE).

Philosophy has an important contribution to make to society, says Professor of Practical Philosophy Glen Newey. You need people who can think clearly, certainly in positions of power and authority. Newey stresses that “there will always be a place for philosophy”. An introduction to the practically…

Starting 1 January 2023, Matthias Haentjens has been appointed as Professor of Civil Law at Leiden University. His expertise lies in the field of property law, insolvency law, and private international law.

The central question is whether the current regime of international humanitarian law governing the conduct of hostilities in armed conflict is still adequate to deal with modern conflict scenarios, or whether it needs revision or amendment.

Are you thinking about studying Global Conflict in the Modern Era? Learn more and watch the introduction video.

The public disclosure of documents under the Dutch Open Government Act (Woo) is often delayed, especially when the information is considered socially or politically sensitive. Dr Annemarie Drahmann, Associate Professor of Constitutional and Administrative law, explains the case on platform for investigative…

The center studies the many ways in which issues of law and justice are dealt with in art and literature with a focus on liminal issues and cases. These are issues and cases where law comes to the limits of what it is capable of dealing with and art and literature explore the implications of what is…

European product safety law is one of the focal points of internal market legislation.

These are turbulent times in the UK. The cost of living is high, leaving many people struggling to make ends meet, and these past few months have been tumultuous in terms of politics. University lecturer Anne Heyer explains what impact this can have on people's political perceptions and participatio…

How much mortgage interest can I claim back according to law? Or maintenance payments, how much do the tax authorities let me deduct? Many citizens struggle with questions about the application of tax legislation. Roberto van den Heuvel investigated in what way tax legislation should provide clarity…

On Wednesday 22 June 2016 Wouter den Hollander will defend his PhD Thesis De relativiteit van wettelijke normen ('The Relativity of Statutory Provisions'). The public defence starts at 16.15 hours in the Academy Building.