Prof. Dr. Wolfgang Hoffmann-Riem, LL.M.

Honorary Member of the Executive Board

Professor Wolfgang Hoffmann-Riem, LL.M. (Berkeley), was director of the Hans-Bredow-Institut from 1979 until he became Senator of Justice for the Free and Hanseatic City of Hamburg from September 1995 to November 1997. He was also chairman of the newly created executive board of the institute from July 1998 to December 1999. Since December 1999, he has been an honorary member of the Executive Board.

He studied law in Hamburg, Freiburg, Munich, and Berkeley. He has been a professor of public law and administrative science at the University of Hamburg since 1974 and has been emeritus since 2008.

From 1999 to 2008, he was a judge at the Federal Constitutional Court (First Senate).

From 2007 to 2019, Wolfgang Hoffmann-Riem was a member of the European Commission for Democracy through Law (Venice Commission of the Council of Europe). He was a fellow at the Wissenschaftskolleg zu Berlin from 2009 to 2010. Since mid-2012, he has been an affiliate professor at Bucerius Law School in Hamburg.

The German President awarded Wolfgang Hoffmann-Riem the Grand Cross of the Order of Merit of the Federal Republic of Germany. He is also the recipient of the Emil von Sauer Prize. In 2024, he received an honorary doctorate from the Pontifical Catholic University of Rio Grande do Sul in Brazil.

Wolfgang Hoffmann-Riem researched and taught at Stanford Law School, Harvard Law School, Tulane Law School, Hastings College of the Law, and the Columbia Institute for Tele-Information. He was a member of the Expert Commission on New Media in Baden-Württemberg; the Inquiry Commission on New Information and Communication Technologies of the German Bundestag; the Inquiry Commission on Parliamentary Reform of the Parliament of the Free and Hanseatic City of Hamburg; and the “Commission on Media Responsibility,” which was appointed by Federal President von Weizsäcker. He publishes works on media law, media social science, constitutional and administrative law, economic and environmental law, police law, and legal sociology.

Contact information

Prof. Dr. Wolfgang Hoffmann-Riem, LL.M.

Honorary Member of the Executive Board

Leibniz Institute for Media Research | Hans-Bredow-Institut (HBI)
Rothenbaumchaussee 36
20148 Hamburg

  • +49 40 450 217-0 (Office Management)

Last update: 11.07.2025

Works by Prof. Dr. Wolfgang Hoffmann-Riem, LL.M.

Publikation Recently Published

Visualizing Regulatory Ecosystems: The AI Act as a Case Study

The article by Magdalena Stratmann, Tobias Mast, and others was developed as part of the STEAM project, "Informing Regulatory Reasoning on Algorithmic Systems in Societal Communication with STEAM." It introduces Architectural Ecosystem Modeling, a visual method that makes the institutional structures of the AI Act visible. This method analyzes responsibilities and dependencies and identifies gaps, overlaps, and opportunities for coordination within the regulatory framework.

eine Frau hinter einem Tisch mit ablehnender Haltung gegenüber Zeitungen auf dem Tisch.
Projekt New Project!

Practices of News Avoidance and Their Implications for Public Connection

What are the effects of news avoidance on belonging to different publics and on political participation? And to what extent do these dynamics contribute to the fragmentation of public spheres? This study examines the effects of different practices of news avoidance on individuals‘ public connection.

Projekt BMFTR Project

Podcasts: Actors, Topics, and Misinformation

As audio media, such as podcasts, become more widely used, the risks of them distributing misinformation, disinformation, and fake news increase. The collaborative project “Systematic Observation of New Auditive Risks” (SONAR) examines the structure of online audio media offerings and develops methods for identifying relevant narratives and manipulation strategies.

Publikation Merz issue and Podcast Available!

Thoughts on the Debate Over Media Bans

Dr. Claudia Lampert, together with Klaus Lutz (Parabol Media Center), edited the latest issue of the media education journal “merz” (2/2026). The issue is titled “Everything Under Control? Thoughts on the Debate Over Media Bans.” Dr. Stephan Dreyer also contributed an article.

Publikation Available for Download

Annual Report 2023-2025

Evaluation, growth, our 75th anniversary, and a new building. The years from 2023 to 2025 were challenging yet fruitful. Our research output was impressive, and our social impact was significant. This annual report provides a brief overview of our activities.

Publikation Open Access Publication

Determinants of Verification Behavior in Generative Search

Generative AI is being increasingly integrated into search engines, but it has been criticized for producing content that sounds plausible yet is sometimes inaccurate. Little is currently known about the factors that prompt users to verify these responses. The study by Eva-Luise Knor, Michael V. Reiss, Judith Möller, and Lisa Merten addresses this knowledge gap.

Publikation Recently Published

Platforms, Online Surveillance, and the European Union: The Digital Services Act (DSA)

In their open-access article, Prof. Dr. Judith Möller, Ronan Ó Fathaigh, Bengi Zeybek, and Rocco Bellanova explore how the DSA facilitates public and private surveillance practices regarding content disseminated on online platforms.

Cover of issue 2/2026 M&K
Publikation Open Access Publication

M&K 2/2026 Has Been Published

The February 2026 issue of M&K features articles that explore the understanding of roles and the transformative potential of peripheral actors in the DACH region. Other articles examine developments in sports coverage in German daily newspapers from 2011 to 2021 and the usage patterns of ChatGPT, as well as anthropomorphic role attributions. You can download all of these articles free of charge.

Front Page of the Working Paper
Publikation Working Paper Available for Download

Babies and Toddlers in Family Influencing

In what ways and how often are babies and young children (ages 0–5) depicted on commercially oriented German-language social media profiles on Instagram, TikTok, and YouTube? Stephan Dreyer, Claudia Lampert, Kira Thiel, and others analyze this question using qualitative and quantitative methods. They also critically discuss the findings in light of the applicable legal framework and media ethics considerations.

Publikation Open Access Publication

Assessing Age Assurance Technologies: Effectiveness, Side-Effects, and Acceptance

In the article “Assessing Age Assurance Technologies: Effectiveness, Side-Effects, and Acceptance,” Dr. Wouter Lueks, Dr. Stephan Dreyer, Prof. Dr. Hannes Federrath, and Prof. Dr. Judith Simon analyze existing age verification methods.

Publikation Review of a Dissertation

Government Public Relations in New Media

For years, the democratic legitimacy of government public relations has been a topic of discussion in academic literature and constitutional jurisprudence. Tobias Mast reviews a recently published dissertation on the subject, exploring the untapped potential of interdisciplinary legal scholarship in relation to commonly accepted empirical assumptions.

Publikation Article for Friedrich-Ebert-Stiftung

Platform Badges for Civic Communication

Digital platforms have become central infrastructures for political communication and social negotiation processes. In his article, Jan Rau examines platform badges, which are tools that platforms use to fulfill their obligation to mitigate risk by creating positive incentives for users to adhere to certain communicative norms.

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