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

Leibniz Institute for Media Research, Hans-Bredow-Institut
Warburgstraße 30b
20354 Hamburg

Last update: 12.11.2025

Works by Dr. Stephan Dreyer

Hände tippen auf Laptop-Tastatur, darüber eingeblendete Symbole für Text, Dokument, Lupe und Auszeichnung mit Häkchen.
Beitrag Media Research Blog Post

Platform Badges for Civic Communication

How can platforms address distortions in the digital attention economy without restricting free expression excessively? This blog post explores how new incentive structures can promote constructive communication on digital platforms and the potential of the Digital Services Act to facilitate such interventions.

Publication by Jan-Ole Harfst in the special edition
Publikation Special Edition of the Bonner Rechtsjournal

Communication Risks in Online Environments

How can German democracy remain resilient in the face of the communicative threats posed by the digital space? Jan-Ole Harfst's article shows that communicative threats on the internet cannot be countered at the national level alone, but require supranational protection of democracy, and assesses the significance of the Digital Services Act in this context.

Publikation Internet Policy Review

Can Quality Badges Improve Communication on Online Platforms?

A seal of approval for civil communication could promote successful public communication on online platforms while respecting users'freedoms. In their article 'Platform Badges for Civic Communication. An Interdisciplinary Discussion of a Risk Mitigation Measure Pursuant to Art.', Jan Rau, Jan-Ole Harfst and Dr. Tobias Mast examine various design options for such seals.

Cover of the publication
Publikation Open Access Publication

Global Media and Internet Concentration

The report offers a thorough overview of the development, economic importance, and market concentration of major companies in Germany's telecommunications, media, publishing, and internet sectors from 2019 to 2023. It places a particular focus on the growing dominance of digital platforms.

Cover der Zeitschrift "Medien & Kommunikationswissenschaft" Heft 4/2025
Publikation Available Open Access

Issue 4/2025 M&K published

Issue 4/2025 of our open access journal “Medien & Kommunikationswissenschaft" (M&K; Media & Communication Studies) has been published online via the platform Inlibra.

Cover of the Book Chapter
Publikation Chapter in Cohesion Report

The Climate Discourse on Social Media

The Social Media Observatory (SMO) examined the dynamics of climate discourse on social media for the Research Institute Social Cohesion's (RISC) second cohesion report. The study found that climate scepticism and misinformation are common in social media debates. However, it is evident that these views are significantly less prevalent in wider society.

The cover of the article "Fertility Preservation from the Patient's Perspective: Areas of Conflict and Information Needs in Social Media," published in the journal Die Onkologie
Publikation Article in the Journal Onkologie

Perspectives of Cancer Patients on Fertility Preservation Measures

Fertility preservation is a key challenge for cancer patients. A qualitative content analysis of social media posts offers insights into patient experiences and provides guidance for needs-based fertility counseling.

Cover of the Working Paper
Publikation Working Paper Available for Download

Algorithmic Competence of Young People on TikTok

A new qualitative #UseTheNews study by the Leibniz Institute for Media Research examines what teenagers and young adults know about how TikTok's algorithmic recommendation system works.

Cover of the publication
Publikation Open Access Publication

Information Systems and Troubled Democracy

Internet freedom has declined for 14 consecutive years. This publication examines how principles for regulating information ecosystems are being implemented, as well as the challenges faced by public institutions and other stakeholders in their efforts to combat misinformation and disinformation.

Screenshot of the article by Dr. Gregor Wiedemann, AVISO, issue no. 81 (Fall 2025)
Publikation Article in aviso I Informationsdienst der DGPuK

AI and Research: Harnessing Potential, Understanding Risks

In his contribution, Gregor Wiedemann highlights the ambivalences that can arise from the use of AI tools in communication science research processes, as well as the necessity of precise risk assessment in this context.

Screenshot of an article on the Verfassungsblog. Title of the article: “Ein rundfunkrechtliches ‘Solange’?” [An “As Long As" in Broadcasting Law?]
Publikation Article on Verfassungsblog

An “As Long As” in Broadcasting Law?

In an article, Dr. Tobias Mast and Prof. Dr. Wolfgang Schulz discuss the Federal Constitutional Court's decision on the constitutionality of the broadcasting license fee. Their analysis is based on the press release published by the Federal Administrative Court on October 15, 2025.

Cover of an expert opinion by Dr. Stephan Dreyer on the AI Regulation and children's rights
Publikation German Children's Fund

Expert Opinion on Children’s Rights and Artificial Intelligence (AI)

In his expert opinion, "The AI Regulation, Its Relationship to Children’s Rights in the Digital Space, and Options for Advocacy Approaches," media lawyer Stephan Dreyer examines how the children’s rights enshrined in the EU Charter of Fundamental Rights are addressed in the regulation.

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