The general aim of this course is to understand how new information and communication technologies change existing markets, lead to the generation of new markets, and how they affect the actors in these markets. The first part of the course will focus on opportunities that arise with new technologies. Companies have been able to leverage the availability of big data and new digital technologies to fundamentally change the functioning of existing markets. New technologies have also led to the creation of entirely new markets and labor relations. Many of these impacts of new technologies have the potential to be welfare improving. However, many new technologies pose at the same time grave and unprecedented challenges, which will be covered in the second part of the course. Providers of platforms often not only match buyers and sellers but also sell to buyers themselves. Digital ecosystems lock in consumers and foster network externalities on a dramatic scale. In these cases, new technologies give rise to fundamentally new and potentially problematic market dynamics, as evidenced by the dominance of key players such as Amazon or Google.