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...

On-track competition in passenger services has traditionally been limited in European railways, with private operators offering marginal services in selected corridors in the UK, Sweden and Germany only. In recent years, a larger scale and more stable wave of open access market entry has...

To encourage private actions for damages in antitrust cases some jurisdictions subtract a fraction of the redress from the fine. We analyze the effectiveness of this policy. Such a rebate does not encourage settlement negotiations that would otherwise not occur. If, however, the parties settle...

On-track competition in passenger services has traditionally been limited in European railways, with private operators offering marginal services in selected corridors in the UK, Sweden and Germany only. In recent years, a larger scale and more stable wave of open access market entry has...