Is globalization threatening cultural diversity? Participants in the TILEC workshop on "Competition Policy and Regulation in Media Markets: Bridging Law and Economics", held in Tilburg on June 4 and 5 2009, discussed these and related questions. The meeting was organized by Ilse van der Haar and Lapo Filistrucchi, with the financial support of the Dutch Royal Academy of Sciences (KNAW). While Mina Burri Nenova (University of Bern) challenged the ability of the EU Audiovisual Media Directive to protect cultural diversity, Joel Waldfogel (University of Pennsylvania) used data from world music charts to show that, while Hollywood dominates world trade in movies, the US has grown less dominant in music markets, where domestic singers are still disproportionately popular. Rachael Craufurd Smith (University of Edinburgh) discussed how media pluralism considerations played a role in recent competition policy cases in the UK and the US, while Peggy Valcke (University of Leuven) presented the results of an inter-university project attempting at constructing indicators of media pluralism for European countries. Simon Anderson (University of Virginia) explained why, even according to conventional economic theory, merger policy in media markets should have the additional objective of preserving the variety of political viewpoints in the public arena.