On 10 March 2021, Pieter Huizing defended his thesis 'Parallel Enforcement of International Cartels and Its Impact on the Proportionality of Overall Punishment'. The doctoral thesis was supervised by Prof. T.R. Ottervanger.

Promotor: Prof.dr. H.J.A. Rottgering, Co-promotor: David Sobral

A MSCA Global Fellowship that aims to explore the socioeconomic and environmental implications of a Latin America circularity transition, and its impact on the EU and global economy.

This paper describes two synthetic lipid models designed to replace human stratum corneum (SC) in studies of the impact of volatile organic chemicals on the molecular organization of the skin barrier lipids.

Political scientists John Gerring (University of Texas, Austin) and Wouter Veenendaal (Universiteit Leiden) evaluate the political implications stemming from the size of a political unit – on social cohesion, the number of representatives, overall representativeness, particularism ('pork'), citizen…

Promotor: Prof.dr. A. P. IJzerman, Co-Promotor: Dr. L.H. Heitman

This thesis investigates how non-genetic factors, such as inflammation and concomitant medication, impact hepatic drug metabolism and subsequent drug metabolizing phenotype predictions.

Promotor: Prof.dr. G.R. de Snoo, Co-promotores: Dr. ing. M.G. Vijver, J.P.M. Vink

Source: The AAPS journal, Volume 16, Issue 4, pp. 681-684 (2014)

The use of N fertilizers has increased worldwide in the past century. While this increased input of N has increased food productivity, it has also contributed to decreases in biodiversity, soil quality and environmental health, including increases in greenhouse gas emissions.

PhD defence

Together. If we look back on the corona crisis some time from now, that will have been the keyword in the political communication, says Arco Timmermans. Having allies is imperative, especially in these times.

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…

From the influx of migrants to the Ukraine referendum: Europe is playing an ever bigger role in our lives. Leiden scientists shed light on developments in Europe and examine the impact of the Union on the lives of its citizens. Read more in the new research dossier on Europe.

The Hub for Impactful and Engaged Research is a new collaboration that brings together five leading educational institutions in the province of Zuid-Holland: Leiden University, the LUMC, Delft University of Technology, Erasmus Medical Center and Erasmus University Rotterdam.

On the 1st of October a new project funded by the Joint Industry Programme (JIP) started at the IBL on the potentially negative effects of sound on fish. Behavioural biologist and bioacoustic specialist Dr. Hans Slabbekoorn leads the international research team.

Rong Yuang, PhD candidate from the Institute of Environmental Sciences investigated the impact of the renewable energy expansion on China’s carbon emission. On 17 May, she will defend her thesis. China is investing heavily in the development of low-carbon electricity sources, like nuclear, hydro-,…

While offshore wind farms generate clean and green energy, scientists are becoming increasingly aware of the harmful impact they may have on marine life. To get a better overview of these impacts and to find the best locations for future wind farms, environmental scientist Yali Si and her colleagues…

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

The Leiden Leadership Centre conducts research into the development of effective public leadership within and between organisations. On the basis of our research and development agenda ‘Furthering Public Leadership’, we focus on public leadership in a public context, on its societal impact, and on leadership…

The institute is funded by the Ministries of Education, Culture and Science and of Foreign Affairs and by Leiden University. To safeguard the institute’s independence and interests in Morocco, it is part of the Netherlands Embassy in Rabat under Moroccan law. The institute performs its tasks under the…

The reintegration of high profile ex-offenders frequently receives great political and public attention. While this attention, more often than not in the form of negative sentiments, may be understandable from a moral perspective, it raises several important questions: how do such offenders reintegrate…

The NestWacht project is a Citizen Science collaboration between Science Centre Delft, Naturalis, and the Citizen Science Lab of Leiden University to engage individuals, families and primary schools in Leiden and Delft in scientific research on the impact of climate change on nature in their city, and…

Broader and more-transparent metrics could help improve how academic quality is assessed. This is what Centre for Science and Technology Studies (CWTS) researchers Paul Wouters (also Dean of the Faculty of Social Sciences), Sarah de Rijcke and Ludo Waltman write together with colleagues in a comment…

A practical checklist with legal, technical and ethical points of view will from now on guide the data scientists when working in Artificial Intelligence: the AI Impact Assessment (AIIA). It has been developed by ECP (Platform of the Information Society) and nine other partners, among them the Leiden…

Life cycle assessment (LCA) reveals the total environmental impact of products or production processes, and EU rules are going to make this even more important.

Courses, business premises for startups or help applying for patents: there are many ways the university can help students or researchers with their businesses.

What effect did the lockdown have on young people? Leiden researchers started a study of this in the first year of the covid pandemic. They discovered an impact on the development of the brain areas involved in social behaviour. The researchers published their discovery in Scientific Reports at Nat…

Rector Magnificus Carel Stolker retired on 8 February. If there was one theme running through his career, it was the links between the University and society. Before he left, Stolker spoke one last time to people from within and without the university about the societal impact of research. On topics…

At the end of 2019, Leiden law student Aoife Fleming was elected UN Youth Representative for Sustainable Development. What impact is the corona crisis having on international climate negotiations?

Leiden University will share impactful research and teaching with policymakers, businesses and the general public at the Impact Fair in Utrecht on Thursday 3, Friday 4 and Saturday 5 April. Visit our stand, meet over a hundred inspiring exhibitors.

Just like last academic year, students from Leiden University will get the chance to gain practical experience at KPN. In cooperation with the telecom company, two Impact Challenges are being offered, around the theme 'building bridges'.

Het Internationaal Strafhof (ICC) in Den Haag bestaat sinds 2002, met als kerntaak het vervolgen van personen die verdacht worden van genocide, misdaden tegen de menselijkheid en oorlogsmisdaden. Wat zijn we opgeschoten met bijna twintig jaar ICC? Promovenda Marieke Wierda onderzocht de impact van het…

The Schengen Agreement has resulted in systematic border controls between EU Member States largely ceasing to apply. Solutions for the associated security risks are often sought in information technology. Tim Dekkers investigated how such technology is applied in this context and will defend his PhD…

Gianclaudio Malgieri, Associate Professor at eLaw, has published a new article together with Cristiana Santos, Assistant Professor at Utrecht University, titled 'Assessing (the Severity of) Impact on Fundamental Rights' in the journal Computer Law & Security Review (CLSR), published by Elsevier.

Research & Politics (RAP) is a peer-reviewed open access journal which focusses on research in political science and related fields through open access publication of the very best cutting-edge research and policy analysis. The journal achieved a high score for the impact factor, which puts it in 49th…

KWR Watercycle Research Institute and the Centre for Science and Technology Studies (CWTS) at Leiden University are collaborating in the area of social impact.

In 2025, Leiden University College (LUC) celebrates its 15th anniversary with the theme 'Global challenges, local impact'. To kick off this anniversary year, we have shared fifteen stories over the past few weeks showcasing how LUC students, researchers, and alumni contribute to societal challenges…

ELS@Leiden research encompasses a wide range of empirical-legal projects carried out within Leiden Law School from the perspective of multiple disciplines and methods. Here you can find the publications of our (former) lab members since the start of the Sector Plan.

Higher temperatures are resulting in changes to vegetation and soil in mountain areas throughout the world. An international research team including Leiden ecologist Ellen Cieraad published an article on 25 January in Nature on the disruption to the ecosystem.

Innovations only achieve true success when people actually use them. PhD researcher Max van Haastrecht developed a cybersecurity app for small businesses and learned how essential it is to align technology with real-world practice.

Andrea Evers, Professor of Health Psychology at Leiden University, has won the Stevin Prize – alongside the Spinoza Prize, the highest scientific award in the Netherlands. She is the third social scientist from Leiden in a row to win one of these prizes. ‘Leiden attracts freethinkers.’

Working towards resilient communities, transparency in science and connecting with the employment market – these are the three key themes being addressed by the departments of Social and Behavioural Sciences at Dutch universities. On 11 February, they presented a joint sector plan to Marcelis Boereboom,…

The Executive Board has appointed Judi Mesman as third Leiden University professor.

We asked our Winter School students to evaluate the effect and significance of this learning experience on their current research trajectories and future plans. Here are some reflections.

At the end of December, the concluding lecture of the Bachelor Honours Class 'Policy and Politics: struggling to combat social inequalities' took place. Students, under the guidance of former minister Jet Bussemaker, tackled the question of what inequality actually is.

The authors provide an approach for eliciting population’s preferences in order to calculate weights for use in the optional weighting step in Life Cycle Assessment.

To contribute to the body of knowledge aiming at a better coverage of ecosystem service assessment in LCA studies, this thesis dives into the challenges of incorporating existing ecosystem service methods within the impact assessment phase of the conventional LCA framework.