Trust that suppliers and buyers will keep their word is a necessary ingredient to a well functioning marketplace. Nowhere is the issue trickier than for electronic markets, where transactions tend to be geographically diffuse and anonymous, putting them out of the reach of the legal safeguards...

Voting is a natural context to investigate how democratic societies balance claims of economic efficiency against claims of distributive equity. We examine data from a series of simple experimental voting games; in each, voters are confronted with two distributional policies, one that promotes...

Online reputation - "feedback" - mechanisms aim to mitigate the moral hazard problems associated with spatially distant exchange among strangers by providing traders with the type of information available in small groups, where members are frequently involved in one another's dealings. We...

A great deal of late bidding has been observed on internet auctions such as eBay, which employ a second price auction with a fixed deadline. Much less late bidding has been observed on internet auctions such as those run by Amazon, which employ similar auction rules, but use an ending rule that...

Experimental sealed bid first price auctions with private values in which feedback on the losing bids is provided yield lower revenues than auctions where this feedback is not given. Furthermore, bids tend to be above the equilibrium predictions for risk neutral bidders. While the latter...

Retributive responses do play a role in human behavior. Whether they are primarily triggered by supposed intentions or by observed consequences of actions is an important question. It can be addressed by experimental studies of retributive responses in situations in which the individual actor...

Applying an evolutionary framework, we investigate how a reputation mechanism and a buyer insurance (as used on Internet market platforms such as eBay) interact to promote trustworthiness and trust. Our analysis suggests that the costs involved in giving reliable feedback determine the gains...

We study an ultimatum experiment in which the responder does not know the offer when accepting or rejecting. Unconditional veto power leads to acceptances, although proposers are significantly greedier than in standard ultimatum games, and this is anticipated by responders.