Part 1: Concepts and debates -- 1 -- Introduction: The policy implications of virtual work; Pamela Meil and Vassil Kirov -- 2. Where did Online Platforms come from? The virtualization of work organization and the new policy challenges it raises; Ursula Huws -- Part 2: Measuring virtual work -- 3. Crowd employment and ICT-based mobile work – new employment forms in Europe; Irene Mandl and Maur…