We experimentally investigate key predictions of supply function equilibrium. While, overall, equilibrium organizes bidding behavior well, we observe three important deviations. First, bidding is sensitive to theoretically irrelevant changes of the demand distribution. Second, in a market with...

We report on two experiments designed to investigate the role of beliefs for ingroup favoritism. On average, dictators transfer substantially more to recipients who are publicly known to share the same group identity, compared to transfers given to recipients who are publicly known to be...