The aim of this paper is to propose a preferences representation model where ambiguity attitudes can be exogenous events or past experience-dependent. We adapt the Recursive Smooth Ambiguity model proposed by Klibanoff (Journal of Economic Theory 144:930-976, 2009) by introducing past experience described by a sequence of neutral events occurring up to the moment of the decision. These neutral events do not provide any information on the true process, but are likely to strengthen or weaken the decision-maker’s ambiguity aversion degree by modifying emotions. Our model can explain some observed behaviors and market inefficiencies. We propose two illustrations. First, we provide a behavioral explanation for the decrease in influenza vaccination in France that followed the H1N1 crisis in 2009–2010. Second, we contribute to the broad literature on the annuity puzzle by introducing the impact of emotions on ambiguity attitudes.

本文的目的是提出一种偏好表示模型，其中模糊态度可以是外生事件或依赖于过去的经验。我们通过引入由决策时刻之前发生的一系列中性事件描述的过去经验来适应 Klibanoff 提出的递归平滑模糊模型（Journal of Economic Theory 144:930-976, 2009）。这些中性事件不提供任何关于真实过程的信息，但很可能通过修正情绪来加强或削弱决策者的模糊厌恶程度。我们的模型可以解释一些观察到的行为和市场低效率。我们提出两个插图。首先，我们对 2009-2010 年 H1N1 流感危机后法国流感疫苗接种减少提供了行为解释。第二，