Indirect reciprocity is cooperation through reputation: third parties cooperate with those known to cooperate and defect against those known to defect. Defection, then, can have the unjust motive of greed or the just motive of retaliation. To establish cooperation, observers should distinguish...

Attractive bonuses and large discounts are often successfully used to attract new customers and increase sales. However, from a marketing perspective these attractive opportunities might have a negative side effect, as they decrease subsequent sales to the consumers who missed them. In this...