The seven most valuable companies are not only linked by their financial success they are linked by Artificial Intelligence and this week on Taking Stock Mandy Johnston looks at the “magnificent seven”; who they are, how much are they valued at, and are they unstoppable in terms of their economic success? Mandy is joined by Karl Schmedders, Professor of Finance at IMD Business School in Zurich. It’s part of our new slot called ‘Tech Scape’ with thanks to PWC. At the other end of all that technology is of course the ‘smartphone’. Mandy discusses the pressing topic highlighted in Professor Jonathan Haidt's new book “the anxious generation”. He argues that smartphones and social media are at the core of a mental health crisis affecting young people and calls for urgent action to be taken.  Mandy talks to Ollwyn Moran, Neuro Developmental Therapist & Founder of COGNI Kids. Plus Mandy is joined by author Daniel Susskind who has just published a magnificent history of economic growth and tells Mandy about the concept of infinite growth on a finite planet.