It increasingly seems that Elon Musk has taken it upon himself to decide what can and cannot be said on Twitter. He bought the platform with the message that there would be room to say whatever you desired, but he himself is casting doubts on that principle.

Marieke Liem, professor at ISGA, discusses how the number of drug-related murders has not decreased in the last years

Conference, Workshop

Lecture, China Seminar

Conference, Interdisciplinary Workshop

113 Suicide Prevention gave a guest lecture about suicide prevention at the Spanish Steps in Wijnhaven

Extremist users of Telegram are moving en masse to other chat apps, such as the anonymous SimpleX. In this way, they hope to avoid detection, now that Telegram founder Pavel Durov is going to share personal data of criminal users with authorities.

PhD defence

PhD defence

PhD defence

PhD defence

PhD defence

PhD defence

PhD defence

Lecture, Talk

Alumni event

Can a robot perform a religious ritual just like a monk? And what exactly is a religious ritual? Robots and religion seem to be two different subjects, but according to university lecturer Elpine de Boer, both can make us think about what it means to be human and what we consider to be of value. Together…

BrainTrain: an initiative from Leiden University in which a team of students visit high schools to make adolescents more resilient against disinformation on the news and on their socials. In an interactive two-hour guest lesson, high school pupils discover how easily their brains can be tricked into…

The Executive Board has appointed Olaf van Vliet as Professor of Economics at Leiden University, specialising in social security and labour market policy from an international perspective. The chair is affiliated to both the Department of Economics (Leiden Law School) and the Institute of Public Administration…

Why do some people with adverse childhood experiences develop mental health conditions whereas others do not? A Leiden research project is looking for volunteers aged between 18 and 24 to help us understand more about human resilience.

The Royal Netherlands Academy of Arts and Sciences (KNAW) has awarded a KNAW Early Career Partnership 2023 to Philippe van Gruisen for interdisciplinary research on (labour) migration from a broad perspective on societal wellbeing.

Assistant Professor Briitta van Staalduinen has received the Best Dissertation Award from the American Political Science Association, Section on Class and Inequality. Her dissertation, Ethnic Inequality in the Welfare State, aims to reconcile the persistence of ethnic inequalities in expansive welfare…

The outreach and engagement platform BrainTrain consists of five enthusiastic students of the masters programme Forensic Family Science. As part of their project, the students visit high-schools to teach adolescents about the brain, make them experience that their own reality is not always the only…

Migrants are expensive. Or are they? Professor Olaf van Vliet collaborated on a big research project from Leiden University to map the costs of migration. During the last episode of this season of the podcast Open Geesten (Open Minds), he talks about the initial results. Do migrants really put a lot…

Criminal law can reinforce social inequality. ‘People at the lower end of society are hit harder by criminal law in a range of different ways’, says Professor Marloes van Noorloos. ‘That has to change.’

Seksueel grensoverschrijdend gedrag en structurele sociale onveiligheid horen niet thuis in vrouwengevangenissen, blijkt uit onderzoek van Leidse onderzoekers Esther van Ginneken en Yara Abbing. Zij vinden dat er een ingrijpende cultuurverandering nodig is en doen aanbevelingen.

How do parents communicate anxiety to their child via body language and words? Psychologist Cosima Nimphy studied this question for her PhD research. Experiments show that children of anxious parents are not more sensitive to their parents’ signs of anxiety.

It is often thought that immigration threatens the solidarity on which redistribution relies. But looking at the post-war period, PhD candidate Emily Anne Wolff finds that this is not the case.

How do digital technologies affect adolescent mental health and resilience? How do we foster a secure online environment? How should we deal with increasing rates of online crimes among adolescents? During the mini-symposium ‘The effect of the online world on adolescents’, presented by the interdisciplinary…

Can we reshape school playgrounds through data and design? By using AI and wearable sensors, data scientist Maedeh Nasri discovered ways to create environments where children, including those with ADHD and autism, can connect, play, and grow.

Gaan vaders minder werken als andere vaders dat ook doen? Helpt betaald ouderschapsverlof hen om meer op te pakken in het huishouden? Hoe bepalend zijn sociale normen voor verschillen op de arbeidsmarkt? Onderzoeker Max van Lent gaat het uitzoeken.

When do we say violence was used in an incident? The answer may seem obvious at first. But interim results from a study by Jolien van Breen show that Dutch people are labelling events in increasingly broad contexts as violent.

Synchronised heart rates and skin conductance tell us that people are attracted to each other. This explains why we feel a romantic ‘click’ with some people and not with others. This is the result of research by psychologist Eliska Prochazkova from the Leiden Institute for Brain and Recognition, which…

In the ESOF2022 mini-symposium organized by the Social Resilience & Security programme, international experts with a background in psychology, philosophy, and law discussed how the online world is related to adolescent mental health issues, moral and emotional awareness and children’s rights. In three…

Misleading social media posts are falsely claiming that the Dutch supermarket chain Jumbo uses facial recognition at self-service checkouts. Jumbo denies this, although it has launched trials with AI cameras to combat shoplifting without using facial recognition.

Distracted eating is common and has adverse health consequences. Read more about the research of Leiden social psychologist Lotte van Dillen and some strategies to combat that behavior.

On Tuesday 30 September 2025, PhD candidate Jonathan Collins will defend his dissertation A Wolf in Sheep’s Clothing: A Mixed-Methods Analysis of the Far-Right Alt-Tech Social Media Movement in Leiden’s Academy Building. His work examines the communication dynamics of far-right communities on alternative…

The Economics Department at Leiden University is pleased to announce a junior workshop focusing on The Economic, Social and Political Effects of Migration, which will be held Friday 19 April 2024, at the Gravensteen in Leiden.

Lecture

Wat gebeurt er op het schoolplein? Sensoren op kleding openbaren pijnlijke patronen

The steady decline in lethal gun violence in the EU came to halt in 2012 and some countries, such as Sweden, have even noticed an increase since then. An arms race among drug criminals and an increase in the availability of illegal firearms could lead to more criminal and gun violence. This is one of…

Carlotta Rigotti and Eduard Fosch-Villaronga have published a new article that offers an insightful and critical literature review on fairness and AI in the labour market as part of the BIAS project.

Many children experience trauma and if they are unable to deal with it properly, it can have a huge personal and societal effect. Building resilience in vulnerable children and young people should therefore have the highest priority. This is the message of Anne-Laura van Harmelen, Professor of Brain,…

People in the Early Bonze Age used bronze artefacts as a means of payment. This is the conclusion reached by archaeologists Maikel Kuijpers and Catalin Popa in a PLOS ONE article published on 20 January. The discovery led to a surge of media reports.

South Korean smash hit Squid Game is on track to becoming the most successful Netflix production ever. The series is number one in over 90 countries. Professor and Korea expert Remco Breuker can see why South Korean pop culture is becoming so popular, also outside Asia.