Telecommunication markets are characterized by a dynamic development of technology and market structures. The specific features of network-based markets, convergence of previously separate spheres and the complex task of market regulation put traditional theoretical approaches as well as current regulatory policies to the test. This book sheds light on some of the challenges ahead. It covers a vast range of subjects from the intricacies of market regulation to new markets for mobile and internet-related services. The diffusion of broadband technology and the emergence of new business strategies that respond to the technological and regulatory challenges are treated in the books 24 chapters.