Modern systems of official statistics require the accurate and timely estimation of socio-demographic indicators for disaggregated geographical regions. Traditional data collection methods such as censuses or household surveys impose great financial and organizational burdens for National...

Leere Busse, ausgefallene Züge, verlassene Flughäfen, Menschen tauschen Tipps zum Spazierengehen aus. Die Mobilität ist in COVID-19-Zeiten stärker in den öffentlichen Fokus gerückt. Nicht zuletzt der Zusammenhang von Mobilität und Ansteckungsraten bringt Mobilitätskennwerte in...

Non-pecuniary incentives motivated by insights from psychology ("nudges") have been shown to be effective tools to change behavior in a variety of fields. An often unanswered question relevant for public policy is whether these promising interventions can be scaled up. In cooperation with a...

Policy makers are increasingly concerned about the combination of market power and massive data collection in digital markets. This concern is fueled by the theoretical prediction that more market power causes firms to collect ever more data from their users. We investigate the relationship...