Prudence with Respect to Ambiguity
定义了模糊性下的审慎概念，即客观概率不可得时的审慎行为，并推导了其对多种模糊性模型的含义，发现其与金融行为相关并在预防行为中起关键作用。
Under expected utility, prudence is equivalent to a positive third derivative of utility and plays a crucial role in precautionary saving behaviour. Eeckhoudt and Schlesinger (2006) proposed behavioural definitions of prudence and of higher order risk preferences. The present article proposes a similar definition for prudence with respect to ambiguity, i.e. situations in which objective probabilities are not available. Implications for several ambiguity models are derived. Ambiguity prudence is implied by Hansen and Sargent's (2001) multiplier preferences, empirically correlates with financial behaviour and plays a key role in prevention behaviour.