Digital media goods and digital media platforms exhibit cost structures and network effects that imply that price and quantity effects of consumption taxes are qualitatively different compared to what we typically find for physical goods. For instance, in most European countries and US states,...

Preface / Elsebeth Korsgaard Sorensen, Daithí Ó Murchú -- 1. Online communities and professional teacher learning : affordances and challenges / Norbert Pachler, Caroline Daly -- 2. Enhancing phronesis : bridging communities through technology / Anders D. Olofsson, J. Ola Lindberg -- 3....