During adolescence, mood disorder onset peaks. Mood variability is associated with negative mental health outcomes, so understanding biological factors that might be associated with mood variability, such as sleep and structural brain development, could elucidate the mechanisms underlying mood and anxiety…

Promotor: M.T.M. Koper, Co-promotor: J.B.F. Juurlink

Phospholipase A/acyltransferase 3 (PLAAT3) and PLAAT4 are enzymes involved in the synthesis of bioactive lipids. Despite sequential and structural similarities, the two enzymes differ in activity and specificity.

Promotor: P.J.J. Hooykaas, Co-Promotor: E.J. van der Zaal

Following the Mangold and Kücükdeveci case law of the CJEU, the horizontal direct effect of EU general principles and of provisions of the Charter of Fundamental Rights became a hotly debated issue.

Have you ever wondered what makes immigrants legally different no matter which legal system they have moved into and no matter what rights have been granted there? Have you ever wondered why immigrants are considered ‘the other’ despite claims that their ‘integration’ and non-discrimination is a top…

The progressive loss and degeneration of dopaminergic neurons is a major pathological hallmark of Parkinson's disease (PD). The onset and progression of PD can be triggered by multiple risk factors, for instance, genetic mutation, environmental exposure, and aging.

This project aims to investigate the underlying (neurocognitive) linguistic processes of ellipsis resolution, particularly gapping.

On 30 November 2019, the event ‘Bogus constructions and intra EU migrants (working in the Netherlands)' took place. This very successful seminar was organized in spirit of the project Solidarity Under Strain (SOLID), part of the research focus area ILS 2.0.

In May 2024, ahead of the European elections, Professor Wolff spoke to 135 pupils from the European Primary School The Hague about Democracy, Europe and the European elections.

Can we tailor catalysts at the atomic scale by means of high-school chemistry and geometry rules?

Ms. Anaïs Massot defended her thesis on 26 January 2021

What is the effect of a dynamic training in children’s inductive reasoning skills and how is it related to children’s school performances and language development.

Ludo Block wrote the eleventh chapter of the book 'Post-Crimea Shift in EU-Russia Relations: From Fostering Interdependence to Managing Vulnerabilities'. His chapter 'Business as Usual? Police Cooperation under a Cloud of Political Animosity' can be found on page 204 of the book.

On 7 November 2024, an ESIL Joint Colloquium, organised by the European Society of International Law (ESIL) Interest Group ‘The EU as a Global Actor’ (IG EUGLOBAL), in partnership with the Interest Group on Migration and Refugee Law (IG MigRefLaw), took place on the topic ‘The EU as an (Imperfect) Global…

On 10 April 2025, Melanie Fink presented her current research on the interplay between EU constitutional law and the regulation of digital technologies.

Article by Leiden University political scientist Daniel Thomas about shifting norms for membership in international organisations.

Book by Soledad Valdivia Rivera

The aim of the project is to unravel the genetic and contact relations between the indigenous languages of Mesoamerica (Mexico and western Central America) and the Middle Andes region (Ecuador, Peru, Bolivia), as part of a larger endeavor to understand the historical process of the peopling of the Americas…

On 3 and 4 November 2022, Melanie Fink convened a Workshop to bring together the authors of an Edited Volume on ‘Access to Justice and the EU’s Remedies System’, to be published in early 2024 by Cambridge University Press.

The Board of Leiden University has appointed Armin Cuyvers as a full professor of European Law, specifically EU Constitutional Law and Comparative Regional Integration, effective per 1 September 2021.

The euro crisis of 2010 has shown that the Eurozone lacks economic cohesion and that EU fiscal integration is needed for a stable euro. But can this integration exist without clashing with the national constitutional interests of the Member States? Frederik Behre looked into this matter in his PhD-thesis…

On 17 February 2016 Armin Cuyvers was invited to speak at the Liverpool European Law Unit (LELU) in a seminar on ‘Legitimacy and participation in the EU’. In his presentation, entitled ‘National parliaments as training wheels of EU democracy?

On March 18 2016 Pieter van Cleynenbreugel and Maarten Aalbers discussed recent developments in EU internal market law and EU state aid law at the International Colloquium on EU Law.

On 12 July, a workshop was held in hybrid format (on site and online) at the University of Reading in the UK on the subject of 'EU law teaching in the UK post-Brexit: Learning from EU law colleagues based in other non-EU states and seeking UK solutions'.

Following the European Union membership referendum in the United Kingdom on 23rd of June 2016 and its result, Brexit has turned into a theme dominating public discussion in Europe and beyond. The vote of the people of the UK to leave the EU represents an unprecedented episode in the history of European…

Moritz Jesse and Daniel Carter, both members of the Europa Institute in Leiden, participated in the Conference ‘EU Citizenship and Federalism: The Role of Rights’ in November 2017.

Christa Tobler appeared as an expert on European law in the political programme

The Council of State in the Netherlands has drawn up a programme of reflection to evaluate the role of the highest administrative court in the child benefits scandal and to learn lessons for the future.

Der Spiegel reports about the planned reform of the EU Code of Conduct aimed at tackling harmful tax practices of EU Member States. A reform is urgently needed to tackle remaining forms of tax competition, which cost EU countries billons of euros every year.

On 20 June, Armin Cuyvers was invited to speak at the Riga Graduate School of law during the concluding conference of their Jean Monnet project on fundamental rights at the frontiers of the European Union – looking for a new balance.

On 14 May 2021, Melanie Fink spoke at the conference ‘EU Responsibility in the International System: Setting the agenda’, organised by the University of Thessaloniki

Faced with warfare on the European continent and growing Sino-American geopolitical disputes, the EU’s rising use of sanctions and attention to economic security call for a better diplomatic understanding of how state-market actor-networks are assets of modern foreign and security policy.

Moritz Jesse delivered a lecture titled 'Legal Risks from, to, and within EU Migration Law - An Inventory’ as part of the lunch seminar series organized by the Amsterdam Centre for European Law and Governance at the University of Amsterdam in May.

Public Panel

On Thursday 21 October 2021, the Europa Institute held a hybrid roundtable on the legal feasibility of financing future EU policies – such as EU Green Deal measures – through debts and of thereby extending the novel funding mechanism introduced by Next Generation EU (NGEU). This roundtable was organised…

In Spring 2023, Simona Demková and Daniel Mândrescu from the Europa Institute secured the new Leiden University Starting Grant, valued at EUR 240,000, for a collaborative project: ‘The EU’s Human-Centred Digital Transformation.’

On 28 January 2022, the Department of Legal Studies (Central European University), the Europa Institute (Leiden University), and the ESIL Interest Group ‘The EU as a Global Actor’ hosted an Expert Panel Discussion on the topic 'AI in the EU and Access to Justice'.

On 9 June 2023, the workshop on ‘Academic Freedom and its Philosophical Underpinnings in EU law’ took place at the Academy Building, Leiden. It was organized in the framework of the Vidi research project The EU fundamental right to ‘freedom of the art and sciences': exploring the limits on the commercialisation…

On 27 and 28 April, Simona Demková participated as a panelist at the conference 'A

On 19-20 October 2023, Europa Institute’s Simona Demkova and Melanie Fink, together with Giulia Gentile (Essex Law School), co-hosted an Expert Roundtable on the topic of ‘The Future of EU Public Law in the Age of Artificial Intelligence,’ in the context of the Digital Constitutionalism (The DigiCon…

This project aims at investigating the multidirectional effects of forced and voluntary forms of migration in the ancient Near East.

The drafting of a handbook that serves as the first guide to European law in the area of children's rights, taking into account the case law of the European Court of Human Rights and the Court of Justice of the European Union (CJEU), as well as the decisions of the European Committee of Social Rights…

I want to understand the overlap between physical health, mental health, and healthy aging and whether/how stress (behaviorally and biologically) may tie these concepts together.

This dissertation is a comprehensive description of the Jiăomùzú dialects. These dialects belong to the Tibetan-Birmese language of the rGyalrong spoken in the province Sìchuā, China.

There is a growing conflict between the US and the EU about the investigation by the Commission under the EU State aid rules into so called

On 21 January 2019 Barbora Budinska and Melanie Fink, researchers at the Europa Institute, spoke at the Workshop ‘Accountability and Control of European Multilevel Administration: Current Challenges in EU Administrative Law’.

In October 2024, Jannemieke Ouwerkerk, Professor of European Criminal Law, was appointed to the European Commission’s (EC) Expert Group on EU Criminal Policy. This independent advisory group focuses on improving coherence and consistency within EU criminal law policy.