Should one use words or money to foster trust of the other party if no means of enforcing trustworthiness are available? This paper reports an experiment studying the effectiveness of two types of mechanisms for promoting trust: a costly gift and a costless message as well as their mutual...

We contribute to the theory of the firm by experimentally investigating a bilateral trade relationship in which standard theory assuming self-regarding preferences predicts that the seller will be better off by investing in the outside option to improve his bargaining position. The seller’s...

We study whether group identity helps mitigate inefficiencies associated with appropriable quasi-rents, which are often created by relationship-specific investments in bilateral trade relationships. Based on previous findings that group identity strengthens other-regarding preferences, we...

In the vast majority of laboratory experiments documenting the existence of reciprocity subjects are endowed with windfall funds. In many environments with salient fairness considerations such endowments are known to inflate subjects’ other-regarding behavior, thereby creating a so-called...

We conduct a laboratory experiment to study whether giving people more time to donate to charity reduces donations. People may intend to donate, but because of the transaction costs of doing so, postpone making the payment until they are less busy, and having postponed making the donation once,...

We conduct a field experiment to analyze the effect of deadline length on charitable giving. Subjects are invited to complete an online survey, with a donation going to charity if they do so. Participants are given either one week, one month or no deadline by which to respond. Donations are...

We develop, and experimentally test, models of informal agreements. Agents are assumed to be honest but suffer costs of overcoming temptations. We extend two classical bargaining solutions -- split-the-difference and deal-me-out -- to this informal agreement setting. For each solution there are...

Previous research has suggested that communication and especially promises increase cooperation in laboratory experiments. This has been taken as evidence for internal motivations such as guilt aversion or preference for promise keeping. The original goal of this paper was to examine promises...

Groups, companies, and organizations identify themselves via symbols. Symbols have the potential to create group identity and at the same time create group boundaries, thus allowing for achieving the benefits of cooperation by ingroup members. We use a laboratory experiment to study the role of...