The perception of fairness of an offer in ultimatum type games may not only depend upon the distributional aspects of the offer itself but also on the intentions of the proposer that an offer may signal. Recovering intentions is subtle and may depend heavily upon the environment and consequently...

We study indirect reciprocity and strategic reputation building in an experimental helping game. At any time only half of the subjects can build a reputation. This allows us to study both pure indirect reciprocity that is not contaminated by strategic reputation building and the impact of...

Repeated interactions provide a prominent but paradoxical hypothesis for human cooperation in one-shot interactions. Intergroup competitions provide a different hypothesis that is intuitively appealing but heterodox. We show that neither mechanism reliably supports the evolution of cooperation...

In reciprocal interactions, both genuine kindness and self-interested material gain may motivate socially beneficial actions. The paper presents results from two experiments that distinguish the role of perceived motives in reciprocal decision making from the role of outcomes or perceived...

In a real-effort experiment, we investigate how the timing of discretionary bonuses affects the relationship between workers and managers. Average output is substantially higher if bonuses are paid in the middle rather than upfront or at the end, as workers increase first-period output to signal...

Recent experimental research suggests that people behave more cooperatively when the rules governing a strategic interaction (e.g. a public goods game) are modified democratically than when they are modified exogenously. In a related experiment, I show that people are less likely to unilaterally...

Recent literature has shown that lying behavior in the laboratory can well be explained by a combination of lying costs and reputation concerns. We extend the literature on lying behavior to strategic interactions. As reciprocal behavior is important in many interactions, we study a theoretical...

We conduct a large-scale survey experiment in nine European countries to study how priming a major crisis (COVID-19), common economic interests, and a shared identity influences altruism, reciprocity and trust of EU citizens. We find that priming the COVID-19 pandemic increases altruism and...

We conduct a large-scale survey experiment in nine European countries to study how priming a major crisis (COVID-19), common economic interests, and a shared identity influences altruism, reciprocity and trust of EU citizens. We find that priming the COVID-19 pandemic increases altruism and...

We conduct a large-scale survey experiment in nine European countries to study how priming a major crisis (COVID-19), common economic interests, and a shared identity influences altruism, reciprocity and trust of EU citizens. We find that priming the COVID-19 pandemic increases altruism and...