A motivation for fairness also seems to be an important factor on eBay, in which the “Buy It Now” format—or an auction with just one buyer—resembles an Ultimatum Game; a seller offers an item at a price that a buyer can accept or reject. To test this hypothesis, Ockenfels and Bolton recruited 100 German university students with selling experience on eBay, divided them into 50 buyer-seller pairs, and asked the sellers to hawk $20 certificates (funded by the researchers) to their assigned partners on eBay.
Consistent with previous Ultimatum results, the most popular selling price was $10, which would result in an equal split of the experimental pot. All but one buyer accepted this offer. Prices above $17 were uniformly rebuffed as too greedy, and some also refused costs between $10 and $17, refuting the idea that monetary incentive alone governs the deal. On the contrary, in this bargaining situation an equal split maximizes profits, Ockenfels says, because buyers generally will not accept unfair offers and sellers seem to realize that. “Fair dealing pays off,” he concludes.
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