The advent of digital television has triggered a revolution in the use of radio spectrum worldwide and in particular in Europe, where the digital switchover, meaning the migration process from analogue to digital broadcasting, has led to two major consequences on spectrum use. First of all,...

New and old products differ in two respects: quality and newness. Whereas a higher quality of a new product always benefits consumers, the newness itself benefits some consumers, but not others, and for some, it is even a disadvantage. We capture these features in a Hotelling model of Over-...