paper follows a longstanding tradition of using factor models of interest rates but proposes a semi- parametric procedure to …

insufficient information and identifi…es the class of non-EU models that emerge in the face of Ambiguity. The paper also proposes a …The concept of Ambiguity designates those situations where the information available to the decision maker is …-expected utility models hanging on a shaky ground. In particular, it leaves unanswered basic questions such as: (1) Does Ambiguity …