INFLUEX examines the influence of experts on public policy, aiming to define, measure, and explain their role in democratic policymaking

Profile Area Political Legitimacy, Leiden University

What can we learn from the diverse institutional logics of smart government in East Asia to inform cross-institutional AI governance?

The Mathematical Institute is responsible for the research and education in mathematics and statistics at Leiden University.

Discover the MSc Democracy and Representation at Leiden University: a structured and intensive programme focusing on democratic challenges like populism and polarization, with electives, research thesis, and small-group teaching.

This project investigates which aspects of social media content adolescents attend to and how these relate to their credibility judgments, aiming to systematically understand their susceptibility to misinformation and inform effective educational programs that foster youth’s resilience to misinforma…

Health workers have always sought ways to fight disease in vulnerable groups in the population. It is now clear that such research also benefits more prosperous countries. African worm infections and innovative thermometers have shown Leiden researchers how to fight diseases of affluence and keep health…

Leiden University commemorates its victims of the war and pays tribute to all members of the university community who resisted injustice.

Understanding the evolving landscape of extremism in the 21st century.

A cautious response to a crisis or terrorist act avoids the creation of a culture of fear. This is another way to reduce our vulnerability to terrorism.

'Trust in institutions' is one of Leiden Law School's four research focus areas.

In the track Terrorism and Political Violence you will be familiarised with the academic debate regarding these contested concepts.

Astronomers Professor Christoph Keller and Dr Frans Snik will be developing a commercial module for measuring fine particulates. They have been awarded an STW Demonstrator subsidy of 138,000 euros.

In a time of growing polarisation and declining trust, the rule of law is under pressure. The system as we know it today only took shape 177 years ago, with the constitutional reform of 1848. Carla Hoetink emphasises: ‘The democratic rule of law was originally designed to prevent violence and revolu…

Astronomers at ASTRON and Leiden University have used the LOFAR radio telescope to discover a 'brown dwarf' – a faint object more massive than Jupiter, but significantly less massive than the Sun. The discovery of the object dubbed Elegast, opens up a new path that uses radio telescopes to discover…

Astronomers and surgeons from Leiden are collaborating with industry to develop an optical instrument that delivers faster, more accurate imaging of tumour tissue and abnormal blood flow during surgery.

The socio-economic effects of climate change often do not receive enough attention. At the EuroScience Open Forum (ESOF) a group of researchers will provide more insight. How does climate change affect whether people work together or conversely end up as opponents? And what can we learn from societies…

Mayors have to do with a society that polarises, politics that change more than ever and a fragmented administrative field of influence. Nikol Hopman and Saniye Celik wrote an essay about this.

While investigating 16 years of images of young stars from a retired astronomical camera, Leiden master's student Sam de Regt discovered that two of those stars were still enveloped in birth clouds. Never before has anyone captured these two stars in so much detail. He publishes his data-cleaning method…

Former PhD, Bachelor and Master students of the Van Exter Lab

On 26 January, Rowie Stolk, Laura Hanrath and Marloes Noorloos spoke at the lecture ‘The Right to Demonstrate under Scrutiny’. This discussion session, part of the university lecture series Community. Conversation. Connection., was organised in response to difficult questions about the right to demo…

As part of his PhD trajectory, Esteban Szmulewicz was invited to give a presentation at a seminar titled 'Challenges of representative and participatory constitution-making: insights from the recent Chilean processes'. The seminar was attended by colleagues affiliated with the Warsaw institution as…

‘We want to say something very different from the norm. We are the radicals now.’ Tahir Abbas is lyric about the DRIVE project he will be leading from Leiden University in The Hague. This is a short introduction to the research that will be carried out in the Netherlands, Denmark, Norway and the United…

In the context of growing political polarisation, the spread of misinformation, and increases in incivility and intolerance, how can Twitter assess and improve the quality of its conversations? To address this question, an interdisciplinary team of researchers from Leiden University, Syracuse University,…

An atomic vandal has finally been caught! Scientists from Leiden University and the Department of Energy’s SLAC National Laboratory have uncovered the mysterious cause behind the rapid corrosion of platinum electrodes. This breakthrough paves the way for more affordable green hydrogen production and…

Students from Leiden University have launched The Nuance Project, a platform for respectful, open-minded dialogue on divisive issues. The aim is to foster connection and understanding among people even if their viewpoints differ.

On 8 September the students of the European Law Master gathered in the Lorentzzaal for the festive opening of their programme.

No evidence found that increasing migration leads to an increase in politically and ideologically motivated criminality. Migration flows have, however resulted in increased polarisation in the Netherlands.

There is broad support for the active involvement of the Netherlands in international cooperation. This is shown by a new public opinion survey among residents of South Holland, conducted by researchers from Leiden University.

From 16 to 18 August, 30 participants from 18 different countries gathered online to participate in the Online Summer Programme: Preventing, Detecting and Responding to Violent Extremism, organised by Leiden University’s Centre for Professional Learning (CPL) together with the International Centre for…

Amid rising polarisation and discrimination, lawyer and human rights activist Lilian Gonçalves-Ho Kang You wants to show in her Cleveringa Lecture on 26 November how dangerous exclusion is.

The Dutch police face complex challenges, from organised crime and polarisation to digitalisation and new forms of crime. To deal with this effectively, they need innovation and intensive collaboration, says Professor by Special Appointment of Police Studies, Monica den Boer, in her inaugural lectur…

From fake news via WhatsApp to mini hearts from a 3D printer: four Leiden researchers have been awarded a Consolidator Grant by the European Research Council. These grants, of up to 2m euros, enable researchers to establish or expand their research team and continue to develop their career.

In the nineteenth century many Dutch people believed in the end of time and the coming of God's thousand-year reign. This belief effectively slowed down the process of modernisation that was taking place in the Netherlands at that time, concludes historian Rie Kielman. PhD defence 13 April.

This research project is funded by a subsidy from Instituut Gak.

Esteban Szmulewicz, a PhD candidate at the Department of Constitutional and Administrative Law, spoke at the annual Salzburg Global Weekend, organised by the Salzburg Global Seminar with the theme 'Democracy on the Front Lines'. Key speakers included Nobel Peace Laureate the Ukrainian Civil Rights defender…

How can the United Kingdom find coalitions for a Brexit? Alexandre Afonso, Assistant Professor at the Institute for Public Administration, analysed how the Members of Parliament voted up to now and presents a graph with possible coalitions on several withdrawal agreements. The article is published in…

On 15 March, the 28-year-old Australian right-wing extremist Brenton Tarrant committed a terrorist attack on two mosques in Christchurch in New Zealand. Jelle van Buuren, Bart Schuurman, Daan Weggemans and Tahir Abbas all working at the Institute of Security and Global Affairs (ISGA) have been approached…

The article of The Economist discusses the problems of Great Britain “exporting” extremists to foreign countries and the serious worries about British extremist who hold a foreign origin. In particularly, citizens whose roots lie in Bangladesh. Last February, Shamima Begum was stripped of her Britain…

Tahir Abbas, associate professor at ISGA, has been appointed as a Fellow of the Academy of Social Sciences. The Academy of Social Sciences is the UK’s national academy of academics, learned societies and practitioners in the social sciences. Its purpose is to promote social science in the United Kingdom…

Leiden University kicked off the first PhD Symposium ‘Institutions for Conflict Resolution’ (COI). COI is a nation-wide partnership that serves to implement the Dutch Legal Sector Plan (2019 – 2024). This partnership aims to preserve the authority and legitimacy of government institutions and the judiciary,…

Within the Faculty of Social and Behavioural Sciences (FSW), D&I translates as the diversity of backgrounds, perspectives, and identities among both students and staff.

De vraag is hoe groot de dreiging van het rechts-extremisme is in Nederland? Nikki Sterkenburg spreekt hierover in Trouw en RTL Nieuws.

The UK has recently been facing racist violence outbreaks. Tahir Abbas, Professor of Radicalisation Studies, discusses this in an article on Hyphen.

The tally now stands at a 19th no-confidence motion in the Rutte IV cabinet, though it is just one year old. All Rutte cabinets combined have faced more no-confidence motions in the past 12 years than the entire parliamentary history before it. The score is 1.5 per month, 87 in total as of 2010 which…

The History Days are coming to Leiden for their anniversary edition! The History Days in Leiden on 27, 28 and 29 August 2026 bring together everyone who works with the past professionally: teachers, students, employees of archives, museums and other heritage institutions, independent entrepreneurs,…

Can politicians say whatever they want? What is the limit and when can the Public Prosecution Service act? PhD candidate Jip Stam examined the limits of free speech in criminal law. 'Intervening too soon can threaten democracy and the rule of law,' he warns.