An introduction describing the main actors and salient aspects of media markets is followed by in-depth analyses of print media, radio and television broadcasting, the Internet, commercial communications, political advertising, concentration in media markets, and media regulation. Among the topics that arise for discussion are privacy, cultural policy, protection of minors, competition policy, access to digital gateways, protection of journalists' sources, standardization and interoperability, and liability of intermediaries. Relevant case law is considered throughout, as are various ethical codes.