¿́¿Policy makers around the world are increasingly worried about developments in some digital markets and in particular digital platforms which use business practices to obtain an advantage vis-a¿¿-vis competitors in vertically related activities (e.g., self-preferencing) or which use their advantages e.g. in data collection and analytics to gain the upper hand over competitors in adjacent markets. Network effects and economies of scale and scope are seen as drivers of market tipping, possibly leading to an entrenched position of the most successful or lucky firm to the detriment of consumers in the long run¿́¿--