We experimentally investigate the effect of population viscosity (an increased probability to interact with others of one's type or group) on cooperation in a standard prisoner's dilemma environment. Subjects can repeatedly choose between two groups that differ in the defector gain in the...

We experimentally analyze first and second price auctions where one bidder can achieve a comparative advantage by investment prior to the auction. We find that, as predicted by theory, bidders invest more often prior to second price auctions than prior to first price auctions. In both auction...

We experimentally investigate the effect of imperfect separation of groups on group selection and cooperation in a standard prisoner¿s dilemma environment. Subjects can repeatedly choose between two groups, where in one of them an institutionalized norm fosters cooperation. The degree of...

Klimaneutralität in Europa gegen Mitte des Jahrhunderts erfordert die Ablösung fossiler Energieträger durch die direkte oder indirekte Nutzung regenerativ erzeugten Stroms in den Sektoren Wärme und Mobilität sowie der Industrie. Die direkte Elektrifizierung und der indirekte Weg über...