This paper analyses whether competition law can help to solve problems of access to data and interoperability in IoT ecosystems, where often one firm has exclu-sive control of the data produced by a smart device (and of the technical access to this device). Such a gatekeeper position can lead to...

Tracking online user behavior is essential for targeted advertising and is at the heart of the business model of major online platforms. We analyze tracker-specific web browsing data to show how the prediction quality of consumer profiles varies with data size and scope. We find decreasing...