Op 2 oktober 2023 zullen meerdere nieuwe delen in de reeks Middeleeuwse Verzamelhandschriften uit de Nederlanden worden gepresenteerd, ditmaal uitsluitend in digitale vorm.

Set up in 1991, this unique project aims to identify and describe the common lexical heritage of the most important Indo-European languages and language branches. The project has thus far resulted in twelve volumes published as The Leiden Indo-European Etymological Dictionary Series (Brill, Leiden).

International Relations and European Politics is one of the three organisational clusters of the Institute of Political Science.

PACES is an innovative, inter-disciplinary and multi-level research project that asks, How do changes in society, individual life experiences and migration policy shape decisions to stay or to migrate over time and across countries? And how can this knowledge inform future migration policies and gov…

De menselijke geschiedenis strekt zich ver uit vóór de tijd waarin de mensen opschreven wat er zoal gebeurde.

Our research deals with the deep history of Europe and Eurasia, from the inception of farming up until the beginning of the Roman Period. This was a period in which key developments took place that had a profound impact on European landscapes and society until the present day. Our research and teaching…

Does a shared idea of the ‘public servant’ exist in Europe? Sager, Overeem, and others explore.

We present an extensive study of methods for exactly solving stochastic constraint (optimisation) problems (SCPs) in network analysis. These problems are prevalent in science, governance and industry.

From 14 to 15 September 2023, Simona Demkova, AI researcher at the Europa Institute, participated in the INDIGO Project Final Conference, where she provided valuable perspectives on the implications of AI for European public law.

Leiden’s Institute for History has an exceptionally strong expertise in premodern European history in its global context, with specialists whose interests cover virtually the whole continent. We have a strong track record in leading larger research teams and work together with colleagues across Europe…

Every day, we make numerous decisions, from choosing what to eat to how we interpret the world around us. Traditionally, researchers have assumed that a key part of our decision-making process, namely the decision criterion, stays stable over time. However, increasing evidence suggests that instead…

This paper, written by Silvia D'Amato & Andrea Terlizzi, investigates the extent to which the European Union is strategically engaging against terrorism.

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

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

The starting point for this research project is the notion that the human brain is susceptible to all kinds of fallacies and biases that affect our perceptions and influence our reasoning outside of our conscious awareness. Indeed, most people think they are merely observing facts and that they process…

The European union, where we live, work and study, is the most ambitious and powerful regional organization for international cooperation in the world. A mystery to many and derided by some, the EU has weathered intense geopolitical and economic storms over the last two decades. In doing so, it has…

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 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…

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

Do recent developments in the European security architecture signal the end of multilateral cooperation, or the beginning of a new era with emerging forms of international security collaboration?

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

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.

Studies of perceptual decision-making typically present the same stimulus repeatedly over the course of an experimental session but ignore the order of these observations, assuming unrealistic stability of decision strategies over trials. However, even ‘stable,’ ‘steady-state,’ or ‘expert’ decision-making…

Are you thinking about studying European Politics and Society? Learn more and watch the programme presentation.

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

European policy affects our lives: from air quality to the frequency of a bus service. Leiden researchers analyse how the European Union functions, how countries apply European policy and whether this policy actually provides solutions and delivers.

Dr. Gruni published an article on the impact on sustainable development in the EU Common Commercial Policy of recent Opinion 2/15 CJEU on the Global Trade and Customs Journal.

Nederland ligt in de periferie van het verhaal van menswording. De evolutie van onze familie vindt lang exclusief in Afrika plaats. En, als Europa eenmaal bewoond wordt door mensachtigen, ligt het zwaartepunt ten zuiden van onze streken. Toch heeft ons land een aantal interessante vindplaatsen en vondsten…

The master's programme in Modern European Philosophy at Leiden University focuses on continental philosophy ranging from German Idealism and Phenomenology via Deconstruction and Poststructuralism through 21st century developments in the field. It explores different approaches to thinking in a critical…

The Center participates in East European Politics, one of the major political science journals focusing on the contemporary post-communist space.

How do crises produce changes in specific European Union foreign policy areas, and how should we conceptualise these policy changes?

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.

De Tweede Kamer wordt de meest versplinterde ooit, met zeven partijen van drie zetels of minder. Waar verschillende experts waarschuwen voor bestuurlijke chaos, ziet hoogleraar staatsrecht, Wim Voermans, hierin juist de kracht van de Nederlandse democratie, zegt hij in het NRC.

In this article, Madeleine O. Hosli and Wen Pan examine how intergovernmental dynamics shaped the European Stability Mechanism, using Liberal Intergovernmentalism to assess negotiation phases, the influence of major member states, and which theoretical assumptions hold or need qualification.

Psychologist Floor van Meer won the first Trial & Error Award for her research on the effect of being distracted while eating on eating behavior. This award from the Journal of Trial & Error (JOTE) honors the often underappreciated aspect of research: learning from errors. For her publication, Van Meer…

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

East European Politics is a refereed journal which publishes articles on the government, politics and international relations of the post-communist world.

The researchers examine the Council of the European Union's voting behaviour between 2010 and 2021 and the impact of different independent variables.

Reconstructing language history and prehistory in the context of the Indo-European language family.

Political scientists Tom van der Meer, Lisa Janssen (University of Amsterdam) and Tom Louwerse (Leiden University) analyse polls presented by the main polling agencies in the Netherlands, as well as micro-level panel data. They reach three main conclusions. First, vote intention polls in the Netherlands…

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

Study European politics, society, and international relations across four major European cities: Prague, Leiden, Krakow, and Barcelona. This two-year joint Master's programme offers a unique interdisciplinary experience.