In your books and columns you have claimed that when people split the bill equally in restaurants they tend to take advantage of each other by ordering expensive dishes. I wonder if this is really true. Wouldn't friends be more considerate of each other?
Considerate restaurant-goer, London
Dear CRG,
The “diner's dilemma” you describe is a kind of prisoner's dilemma, and in theory people should behave exactly as I have described. But many laboratory experiments suggest we are not as selfish as economists' models claim. So you are right to ask for more evidence.
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