Book excerpt: Driven by the fascination about dramatic structural and competitive changes within telecommunication and information technology in dustries during the past decade, the convergence phenomenon has increasingly gained my personal attention throughout my work and studies. Therefore, not entirely coincidentally, this book was written as the result of my doctoral research at ETH Zurich, which turned out to be a challenging, yet highly rewarding endeavor. However, this work would not have been possible without the enduring support of several people. First, I would like to express my gratitude to my thesis supervisor Prof. Fritz Fahrni, for providing me with the opportunity to conduct exciting research projects in close collaboration with industry, and for supporting me with solid guidance and advice all the way. Also, I would like to thank Dr. Christian Marxt, for urging me to pursue the chosen line of enquiry, as well as for his devoted coaching, both at ETH and at Stanford, both within and beyond of?ce hours. Furthermore, I am grateful to Prof. Georg von Krogh, for his encouraging feedback and valuable comments during various inspiring discussions.