We characterize the outcome of majority voting for single--peaked preferences on median spaces. This large class of preferences covers a variety of multi--dimensional policy spaces including products of lines (e.g.\ grids), trees, and hypercubes. Our main result is the following: If a Condorcet...

To which extent high performances in professional sports are based on the use of illicit substances or other doping practices is extremely difficult to measure empirically. Game-theoretical approaches predict strong incentives to dope based on the interaction among athletes (prisoner's dilemma)...

We study network formation in a strategic setting where every agent strives for short paths to the other agents. The main parameter of our model is the marginal rate of substitution between network benefits and linking costs. We provide boundaries of stable networks for increasing and decreasing...

Since the seminal contribution of Jackson & Wolinsky 1996 [A Strategic Model of Social and Economic Networks, JET 71, 44-74] it has been widely acknowledged that the formation of social networks exhibits a general conflict between individual strategic behavior and collective outcome. What has...

Although both betweenness and closeness centrality are claimed to be important for the effectiveness of someone's network position, it has not been explicitly studied which networks emerge if actors follow incentives for these two positional advantages. We propose such a model and observe that...

The importance of social and economic networks has meanwhile been widely acknowledged throughout social sciences. Network positions are supposed to be important for both, consumers and suppliers. Examples are R&D collaborations, strategic alliances, knowledge management within organizations,...

We conducted a multi-wave field experiment to study the interaction of peer effects and self-control among undergraduate students. We use a behavioral measure of self-control based on whether students achieve study related goals they have set for themselves. We find that both self-control and...

In the framework Hotelling-Downs competition two players can freely choose a position along a one-dimensional market. We introduce restrictions of feasible strategies and analyze the consequences for players and consumers. In equilibrium players may minimally differentiate away from the center...