The book analyzes the central role of media, telecommunications, and information technology as driving factors on the path to a digital economy: the Internet economy. By 2005, half of the German population is expected to be online. The significantly revised third edition of the book incorporates the current developments of the dynamic market. In the new edition, the topics of attention economy and electronic commerce are particularly expanded and continued. The extensive data appendix, which provides the key European indicators, has also been updated. With this concept and its international integration, the book stands unmatched. Its forward-looking analysis makes it an indispensable standard work for industry and academia.