We analyze competition between workers in a gift-exchange experiment where two workers are hired by the same employer. In the competition treatment the two employees simultaneously choose their effort whereas in the baseline treatment competition cannot occur since there is only one employee per...

We analyze linear, weakest-link and best-shot public goods games in which a distinguished team member, the team allocator, has property rights over the benefits from the public good and can distribute them among team members. These team allocator games are intended to capture natural asymmetries...

This paper analyzes in a large-scale field experiment (N = 2,980) the incentive effects of monetary vs. non-monetary incentives on the usage of a sustainable Demand Responsive Transport (DRT) system. Financial incentives were implemented by offering customers vouchers, which were received when...

Although there is a lot of evidence for the positive welfare effects of contract farming, it is not clear how to integrate farmers into contracts and how to maintain stable long-term-relationships between farmers and agri-business firms. While Contract Farming is a formal institutional...

This dissertation presents three independent essays that elicit social preferences in school children by using a combination of experimental measures and survey data. Chapter 2 consider the development of motivations for helping in informal risk-sharing networks from a sample of school children...

In this paper, we analyze how pay-regime procedures affect antisocial behavior at the workplace. In a real-effort experiment we vary two determinants of pay regimes: discrimination and justification of payments by performance. In our Discrimination treatment half of the workforce is randomly...

This paper studies motivational crowding-out effects after financial incentives are lowered. In a real-effort setting, workers receive a piece rate before financial incentives are substituted by a one-time payment. Under the fixed payment, effort is significantly lower only when preceded by...

Für Investitionen am Kapitalmarkt spielt die Portfoliotheorie (Markowitz, 1952) eine bedeutende Rolle und bildet nach wie vor eine wichtige Entscheidungsgrundlage für die Strukturierung von Anlageportfolios. Für risikoaverse Anleger ist die Diversifikation der Portfoliobestandteile eine...