This paper explores the limitations of intention-based social preferences as an explanation of gift-exchange between a firm and a worker. In a framework with one self-interested and one reciprocal player, gift-giving never arises in equilibrium. Instead, any equilibrium in a large class of...

The paper shows that several game-theoretic solution concepts provide similar comparative statics predictions over a wide class of games. I start from the observation that, in many experiments, behavior is affected by parameter shifts that leave the Nash equilibrium unchanged. I explain the...

We consider a two-stage game with cost-reducing investments followed by a linear differentiated Cournot duopoly. With competition inversely parameterized by the extent of product differentiation, investment in the subgame perfect equilibrium is typically minimal for intermediate levels of...

Public agencies rely on two key modes to procure goods and services: auctions and direct negotiations. The relative advantages of these two modes are still imperfectly understood. This paper therefore studies public procurement of regional passenger railway services in Germany, where regional...

The relation between the intensity of competition and R&D investment has received a lot of attention, both in the theoretical and in the empirical literature. Nevertheless, no consensus on the sign of the effect of competition on innovation has emerged. This survey of the literature identifies...

Using a simple but general two-stage framework, this paper identifies the circumstances under which increasing competition leads to more cost-reducing investments. The framework can, for instance, capture increasing substitutability for different types of oligopoly models or changes from Cournot...

This paper analyzes two-stage rank-order tournaments. A principal decides (i) how to spread prize money across the two periods, (ii) how to weigh performance in the two periods when awarding the second period prize, and (iii) whether to reveal performance after the first period. The information...