The Centre for the History of European Integration (CHEI) is an initiative that brings together scholars working on European integration, broadly conceived, from a historical perspective.

The League of European Research Universities (LERU) is a group of 24 leading European research universities.

Leiden experts research ways in which European legislation is converted into national legislation. Knowing how this process works can inspire policy-makers trying to achieve their aims while abiding to Europan legislation.

Research on this theme concerns the legitimacy and effectiveness of Europe’s institutional order in the face of public alienation and normative contestation.

How to explain the apparent high success rates of the EU infringement procedures, which are the major tools for enforcing EU law, against the member states?

A large amount of the EU's used or wasted textile is exported towards lower-income countries. Much of this exported textile is either burned or dumped and the amount that is truly reused or recycled is uncertain.

Akbik and Diessner expand the classic typology of police-patrol and fire-alarm oversight with two new categories: planning bureaus and ambulance chasers.

The policies relating to language pursued by European monarchies and states have been widely studied, but far less attention has been given to their linguistic and cultural policies in territories outside their own borders.

Context and contents of the Izcatqui manuscript in the Royal Tropical Institute, Amsterdam

Müller, Braun & Fraussen examine the conditions under which commissioners appear in the news and which communication strategies they pursue.

The article examines how Southern European member states' newspapers portray European irregular migration governance.

Being a Slave brings together scholars and writers who try to come to terms with the histories and legacies of European slavery in the Indian Ocean.

This paper develops a novel theoretical framework for the conduct of postmortems after major foreign policy surprises for the European Union and its member states.

The main aim of the project is to collect and update on a regular basis bibliometric and patent indicators that can be used to underpin and inform analyses pursued at the European Commission (EC) to assess European and national scientific and technological performance.

Sarah Giest, Assistant Professor at Leiden Univeristy, researched the topic of regulatory and market structures that affect nudge implementation by private actors, captured by the ‘budge’ idea.

1) Assess the trends in supply and production status of these critical minerals and mineral products worldwide and Europe’s dependence including on intermediate products such as permanent magnets, RE based super alloys, batteries, polishing compounds, phosphors, catalysts etc. 2) Trace the entire value…

On 23 juni 2019, Zygimantas Juska defended his thesis 'The Role of Collective Redress Actions to Achieve Full Compensation for Violations of European Union Competition Law'. The doctoral research was supervised by Prof. dr. T.R Ottervanger.

The project GRADIENTS investigates what it meant to be European in colonial Africa where identification as European often did not depend on skin colour and was understood on a spectrum with many gradients.

On Thursday 15 February 2018, the Hazelhoff Centre for Financial Law welcomed Roel Janssen, financial and economic journalist and writer, for the fifteenth Hazelhoff Guest Lecture.

Lecture, European Union Seminar

Lecture, European Union Seminar

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How do the starchy botanical foodways reflect upon previous archaeological understandings in the northern and circum-Caribbean?

Talha Gunay has been awarded the 2025 Diploma in the Law of the European Union by the Academy of European Law at the European University Institute (EUI).

Leiden University takes part in several European research and education projects.

The Master’s in European Union Studies at Leiden University offers students an opportunity to study the EU from multiple disciplinary perspectives.

European Law is a one-year Master’s specialisation at the internationally renowned Leiden Law School at Leiden University. The programme distinguishes itself by its broad intra-disciplinary approach, covering institutional, constitutional as well as internal market and competition law of the EU in addition…

This special issue of the Journal of European Policy presents results from the research on the European Union Enlargement and its Integration Capacity. The Journal of European Public Policy is one of the leading journals in this field.

This research concerns a network of labour law specialists in the EU. The growing internationalization of the economic market and the employment market has a major impact on legislation and research of labour law. Particularly within the European Union labour law is subject to constant development…

How many of our laws in the Netherlands are actually determined by the European Union? In many areas, the influence of the EU has increased. But 80 per cent – a figure referred to in 1989 by then European Commission President Jacques Delors – is a very wide estimate. Research from around 15 years ago…

This paper explores whether multilateral surveillance and policy coordination under the ES was based on a path-changing or a path-dependent mechanism

The European courtroom as political arena? Judicial interference in politically charged issues in European asylum law and criminal law

Bernhard Rieger leaves University College in London to research European History after 1945 at Leiden University. He will start as professor of European History on January 15th 2018.

The Law of the European Union is a complete reference work on all aspects of the law of the European Union, including the institutional framework, the Internal Market, Economic and Monetary Union and external policy and action.

Research on this theme concerns Europe’s position in global markets, its response to the emergence of new international trade and financial actors that challenge institutions where Europe has long had considerable influence.

As from 1 August 2016 Jannemieke Ouwerkerk will be appointed to the position of Full Professor of European Criminal Law at the Institute for Criminal Law and Criminology of Leiden University. It concerns a full-time position. She will deliver her inaugural lecture on 7 April 2017 at 16.00.

How should European financial law best integrate considering the interaction of the relevant legal systems?

From 1 June 2020, Jorrit Rijpma will be holding the chair in European Law, specialization Area of Freedom, Security and Justice.

Research on this theme addresses the systemic risks faced by European societies and affecting the quality of life of European citizens.

The aim of this EU+ project is to study and develop instructional tools for inclusive pedagogies in higher education.

How can we understand the implementation of EU policy and what challenges are involved?

The Journal of European Public Policy has dedicated this year’s Special Issue to the theme of European Union Enlargement and Integration Capacity, on the suggestion of Dr. Antoaneta Dimitrova, senior lecturer at the Institute of Public Administration of Leiden University. Moreover, the Special Issue…

EU foreign policy has become increasingly politicised over the past years, amongst others as a consequence of the succession of crises. Crises may engender processes of crisis framing and contestation. This article focuses on how the policy demands being voiced in these processes of contestation are…

The handbook is a wide-ranging survey of a crucial period in prehistory during which many social, economic, and technological changes took place. Written by specialists in the field, the book provides coverage both of the themes that characterise the period, and of the specific developments that took…

The European Homicide Monitor (EHM) offers a standardized framework for countries and regions to compare homicide characteristics, patterns and trends.

In this article, Seda Gürkan & Rosa Sanchez Salgado show which emotions the Members of European Parliament (MEP) expressed in the wake of Qatargate.

The European Council and the European Commission have a similar role in agenda setting. Both place issues on the EU agenda. However, these institutions have distinct designs. They have different political attributes (the European Council has considerably more political authority) and information-processing…