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Data Science Lab Blog

Bridging Data and Policy

The Data Science Lab Blog explores how data-driven approaches shape public policy, featuring research insights, case studies, tools, student stories and latest updates from the Lab. 

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    • Data science and policy analysis
    • Machine Learning and Deep Learning
    • Natural Language Processing and computer vision
    • Policy analysis and methods
Blog
20.05.2025

The Deutschland Ticket: a step towards affordable, sustainable mobility, but who really benefits?

In May 2023, Germany launched the Deutschland Ticket (DT), a €49 monthly pass offering unlimited travel on local and regional public transport. Excluding long-distance and high-speed trains, the DT builds on the success of the €9 ticket from summer 2022. As living costs and climate concerns rise, this low-cost model stands out, especially compared to Austria’s Klimaticket and Switzerland’s Generalabonnement, which are far more expensive.
Blog
07.05.2025

Human-AI collaboration could improve the protection of social media users from hate speech

Despite its initial promise of connecting people, social media has enabled the amplification of extreme voices, allowing hate speech to thrive online and fueling real-world violence. To counter these potential severe consequences, social media platforms invest in content moderation, through activities such as deleting hateful posts or suspending hateful users.
Blog
22.04.2025

Transforming policy through data: the public impact journey

Dr. Helena Bakic connects academic research with practical policy at the Bertelsmann Stiftung in Berlin. After completing her Master's in Data Science for Public Policy at the Hertie School, she now crafts systems for institutional data sharing whilst pioneering analytics and AI applications across diverse projects.
Blog
08.04.2025

Probability vs. non-probability online surveys: challenging traditional assumptions in research methodology

Recent findings from a comparative Austrian study suggest we may need to reconsider our assumptions about online survey methodologies. The Brown Bag series recently featured Dr. Julia Partheymüller of the University of Vienna, whose research compares probability-based and non-probability online surveys with surprising results.
Blog
01.04.2025

Hertie students shine at DataFest Germany 2025

All-female team from the Master of Data Science for Public Policy win “Best Visualisation” at the hackathon in Munich.
Blog
27.03.2025

Reducing energy consumption in HPC: the role of better management tools

In March, PhD candidate and research associate Chiara Fusar Bassini from the Data Science Lab and the Centre for Sustainability at the Hertie School, in collaboration with Leonard Hackel from Technische Universität Berlin and the Berlin Institute for the Foundations of Learning and Data (BIFOLD), and Thorren Kirschbaum from Helmholtz-Zentrum Berlin and Freie Universität Berlin, published a paper in The Weizenbaum Journal of the Digital Society (WJDS).
Blog
25.03.2025

Data Science Brown Bag: The Power of Causality: Julia Rohrer’s Research on Personality and Methodology

The latest session of the Brown Bag series featured an engaging talk by Julia Rohrer from the Wilhelm Wundt Institute for Psychology at the University of Leipzig. Her presentation, titled "Everything is Causal Inference!", explored the role of causal reasoning in research and why mastering it is essential for drawing meaningful conclusions from data.

Blog
10.03.2025

Human vs. AI Decision-Making: Insights from Professor Kosuke Imai's Talk

A thought-provoking talk by Professor Kosuke Imai (Harvard University) on the impact of AI in decision-making was hosted by the Data Science Lab at the Hertie School on 6th March.
Blog
26.02.2025

Making bikes count for climate and health

Cycling is crucial for public health, improving air quality, and promoting sustainable urban living. However, cycling volume data is often scarce, as most cities rely on a few isolated counting stations. New research demonstrates how machine learning and existing data can be leveraged to estimate city-wide cycling volumes.
Blog
26.02.2025

The Hidden Life of Research Error: Will Lowe takes us behind the scenes of psychological research to reveal what reviewers, readers, and even other researchers rarely see

Will Lowe takes us behind the scenes of psychological research to reveal what reviewers, readers, and even other researchers rarely see. 
Blog
23.02.2025

Data Science Meets Democracy: Leading Experts Analyse German Federal Elections

A discussion took place at the Hertie School, where leading experts analyzed campaign strategies and forecasted post-election scenarios through the lens of data science
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For 20 years, the Hertie School has been teaching, researching, and debating good governance and public affairs in the heart of Berlin and Europe. The social science university offers master's degrees, doctoral programmes, and executive education to train change-makers in government, business, and civil society. True to its motto "Understand today. Shape tomorrow." the university conducts interdisciplinary research, provides international and practice-oriented education, and serves as a forum for public debate. Six centres of competence strengthen its expertise in European affairs, international security, fundamental rights, sustainability, digital governance, and data science. The Hertie School was founded in 2004 by the non-profit Hertie Foundation and has been generously supported by it ever since. It is a member of the European university alliance CIVICA, publicly recognised, and accredited by the Accreditation Council as well as the German Council of Science and Humanities.
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