Dr. Stephan Dreyer

Senior Researcher Media Law & Media Governance

Stephan Dreyer is Senior Researcher in Media Law and Media Governance at the Leibniz Institute for Media Research | Hans-Bredow-Institut (HBI). His research focuses on regulatory issues of mediated communication in a datafied society. He looks into challenges that regulation is facing in the light of new technologies, services and changing media use.

Currently he is working on legal issues of AI-based communication and automated decision-making systems, (social) bot communication and the limitations of transparency/disclosure as a regulatory resource.

He’s a legal expert in regulatory questions at the intersection of protection of minors, privacy and data protection. He also conducts legal and comparative analyses of systems in the area of media-related governance.

In the context of his PhD thesis, he has investigated the margins of appreciation as well as the determinants of legal decisions under uncertainty, with a specific focus on the protection of minors. His thesis also focused on the different scope for decision-making by legislators, supervisory authorities and self-regulatory bodies and their relevance for dealing with uncertainty.

After having studied Law at Universität Hamburg with a focus on Information and Communication Law, he has been member of staff at the Hans-Bredow-Institut since 2002.

Activities Outside of the Institute

Stephan Dreyer is spokesperson for the Complaint Committee as well as the Expert Committee of the “Association for Voluntary Self-Regulation of Digital Media Service Providers” (FSM); he is a Surveyor for Child Protection at the Entertainment Software Self-Regulation Body (USK.online) as well as member of the USK Appeal Commission. He is member of the board of trustees of the German Association for Voluntary Self-Regulation of Television (FSF) and member of the Advisory Board at klicksafe.de. In the context of the European CEO Coalition (2011-2014) he has chaired the “Technical Task Force on Interoperability and Machine-Readability”, who has analysed opportunities and specifications of technical interoperability of electronic age classification information. From 2014 to 2016 he has been leading project co-ordinator of the international, EC co-funded technical pilot MIRACLE (Machine-redable and interoperable age label classifications in Europe), a project that has shown that interoperable age classifications are technically feasible, consumer-friendly and that ratings interoperability can strengthen the Digital Single Market to a significant degree.

Contact information

Dr. Stephan Dreyer

Senior Researcher Media Law & Media Governance

We are no longer located at Rothenbaumchaussee 36. You can reach us temporarely at the following address:

Leibniz Institute for Media Research, Hans-Bredow-Institut
c/o betahaus | Gänsemarkt
Gänsemarkt 43
20354 Hamburg

Last update: 28.07.2025

Works by Dr. Stephan Dreyer

Screenshot of the website diskursmonitor, entry “Social Bots” by Gregor Wiedemann
Publikation Online Portal for Strategic Communication

Glossary Entry on “Social Bots”

Dr. Gregor Wiedemann wrote a glossary entry on “social bots” for Diskursmonitor, a collaborative online platform that aims to educate and document strategic communication. This topic is marked by major controversy in academia, some of which has played out in public.

Cover of the M&K journal, issue 3/2025
Publikation M&K 3/2025 as Special Issue

Diversity, Intersectionality, and Gender in Journalism

The third issue of M&K in 2025 is a special edition on "Diversity, Intersectionality, and Gender in Journalism," edited by Margreth Lünenborg, Ana-Nzinga Weiß, Yener Bayramoğlu, and Bernadette Uth. The nine articles are available open access on the Nomos eLibrary.

Cover of an article by Judith Möller et al. in the journal
Publikation Article in Journal of Communication

Positioning and Presentation of Articles in News Aggregators

In the study “Nudges for News Recommenders,” Dr. Nicolas Mattis, Lucien Heitz, Dr. Philipp K. Masur, Prof. Dr. Judith Möller, and Prof. Dr. Wouter van Atteveldt examine how the placement and presentation of environmental news in news aggregators can influence user behavior.

Cover of the Oxford Handbook
Publikation Digital Orders of the Future

Digital Constitutionalism Rethought

In a chapter of the Oxford Handbook of Digital Constitutionalism, Matthias C. Kettemann and Anna Sophia Tiedeke explore digital constitutionalism from the perspective of various normativities. These are the diverse rules, values, and organizing principles that shape the digital space.

Eine hübsche junge Familie aus Vater, Mutter Kind blicken strahlend in die Kamera, im Vordergrund links ein Ringlicht
Projekt Project for State Media Authorities

Babies and Toddlers as Family Influencers

The HBI is conducting a qualitative and quantitative study to examine how babies and young children under the age of five are portrayed on commercial German-language 'family influencing' profiles on Instagram, TikTok and YouTube. A team led by Dr. Claudia Lampert and Dr. Stephan Dreyer is discussing the findings in relation to the existing legal framework and media ethics considerations.

Cover des Buchs "Recht der Digitalisierung"
Publikation Available Open Access

Law of Digitalization

Can the right legal framework meet the central challenges of digitization? This volume, edited by Prof. Dr. Matthias C. Kettemann, explores important new areas of law, the regulation of AI, the role of digital services, and the characteristics of effective technology policy and sensible innovation law.

Screenshot der ersten "Seite" des Artikels auf dem Verfassungsblog
Publikation Article on Verfassungsblog

DSA Enforcement by the EU Commission

The problematic role of the European Commission in enforcing the Digital Services Act (DSA) and possible alternatives are the focus of a blog post published by Jan-Ole Harfst, Dr. Tobias Mast, and Prof. Dr. Wolfgang Schulz on 16 July 2025 on the Verfassungblog.

Cover der Zeitschrift
Publikation Recently Published

Community Data Trust for Sensitive Data

Jan Rau, Moritz Fürneisen, and Gregor Wiedemann co-developed the concept of community data stewardship to facilitate the collaborative creation and utilization of sensitive data in communication science. By using the example of research into right-wing extremist online communication, they demonstrate how community data stewardship can be structured.

Cover der Zeitschrift UFITA
Publikation Recently Published

On the Public Value of Public Service Media

"What Can Audience Research findings tell us about the public value of public service media?" This question explored by Prof. Dr. Uwe Hasebrink and PD Dr. Jan-Hinrik Schmidt, who published their insights in the issue 2/2024 of the journal UFITA.

Cover of the journal New Media & Society
Publikation Open Access Publication

Personal Preferences When Searching for Political Information

Lisa Merten and five co-authors researched how personality traits and attitudes affect the search for political information. Their article has now been published open access in the journal New Media & Society.

Cover der Broschüre zum 75. Geburtstag
Publikation Brochure Available for Download

Facets of 75 Years Hans-Bredow-Institut

With this brochure. we take a look at the institute's development since 1950. While we do not claim to provide a complete history, we aim to highlight some of the institute's unique characteristics, showcasing moments in the past when these features were particularly evident.

Altes Zeitungsfoto von Hans-Bredow,
Beitrag HBI 75: Founding History

How the Institute Got Its Name

On May 30, 1950, the Hans Bredow Institute was founded by the former Northwest German Broadcasting Corporation (the predecessor of NDR and WDR) and the University of Hamburg. This blog post describes the history of its founding and explains how the institute got its name.

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