Weltweit wird über Reformen der sozialen Sicherung diskutiert. Eines der zentralen Themen dabei ist, welche Aufgaben der Staat übernehmen und was privaten Akteuren überlassen bleiben soll. Dabei geht es nicht nur um den Umfang, sondern auch um die Art staatlicher Tätigkeit, z. B. durch...

This study designs a natural field experiment linked to a controlled laboratory experiment to examine the effectiveness of matching gifts and challenge gifts, two popular strategies used to secure a portion of the $200 billion annually given to charities. We find evidence that challenge gifts...

There is now an extensive literature on "gift exchange" showing that when principals and agents can trade "gifts" (rewards that should not emerge in a competitive equilibrium), exchange becomes more efficient. However, it is not obvious how gift exchange should be organized if the principal's...