Adaptation to climate change is an investment decision with unique challenges including uncertainty, long time horizons, and market imperfections that hinder optimal private action. Public sector involvement should address market failures while avoiding moral hazard and the crowding out of...

The 9-Euro Ticket increased public transport use but hardly shifted away from car travel. Train use surged for leisure activities; car use dropped least among commuters. The 9-Euro Ticket led to overcrowding, delaying both regional and non-covered long-distance trains. A rough calculation...

Domestic violence is a pervasive threat to women's well-being worldwide and many victims are repeatedly abused by their partners. One possible but controversial police measure to deal with this problem is to arrest suspects immediately on the spot. Geo-coded 999 emergency call data can be used...