Game theory 'decision tree'

This diagram -- known in game theory as a decision tree -- shows the benefits that flow to two "Mansfield Park" characters under a range of scenarios involving the disposition of a knife with sentimental value. Betsey Price has laid claim to the knife, which belongs to her older sister Susan, who wants it back. For Betsey (in bold) and oldest sister Fanny (in regular type), the best payoff comes when Fanny buys a new knife, inspiring Betsey to return the old knife and restoring harmony among the sisters.

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