Many Internet markets rely on ‘feedback systems’, essentially social networks of reputation, to facilitate trust and trustworthiness in anonymous transactions. Market competition creates incentives that arguably may enhance or curb the effectiveness of these systems. We investigate how...

We compare how freshmen business students, graduate business students and experienced procurement managers perform on a simple inventory ordering task. We find that, qualitatively, managers exhibit ordering behavior similar to students, including biased ordering towards average demand....

In sequential equilibrium theory, reputation building is independent of whether the reputation builder is matched with one long-run player or a series of short run players. We observe, however, that reputation builders are significantly more challenged by long-run players in both laboratory...

We conducted a framed field experiment on eBay, and examined to what extent both social and competitive laboratory behavior are robust to institutionally complex real world markets with experienced traders, who selected themselves into these markets. For buyers, the data strongly confirm the...

We investigate a three-person coalition game in which one bargainer, the builder, can propose and build a coalition over two stages. In equilibrium, coalition building ends with an efficient grand coalition, while the equilibrium path is contingent on the values of the two-person coalitions and...

People do not only feel guilt from not living up to others' expectations (Battigalli and Dufwenberg (2007)), but may also like to exceed them. We propose a model that generalizes the guilt aversion model to capture the possibility of positive surprises when making gifts. A model extension allows...

Standard economic theory does not capture trust among anonymous Internet traders. But when traders are allowed to have social preferences, uncertainty about a seller's morals opens the door for trust, reward, exploitation and reputation building. We report experiments suggesting that sellers'...

Reciprocity in feedback giving distorts the production and content of reputation information in a market, hampering trust and trade efficiency. Guided by feedback patterns observed on eBay and other platforms we run laboratory experiments to investigate how reciprocity can be managed by changes...